Energy and Environment Field (Plasma, high voltage, large current interruptions, thermoelectric conversion, environmental sensing, and biometrics)
- Ultra-High-Sensitivity Optical Measurement and Its Application to Environmental Sensing (Kadono and Lim Lab.)
- Development of optical measurement technology , environmental sensing (Kadono Lim Lab.)
- Basic Study on Chemically Active Species Generation Using Discharge (Maeyama and Inada Lab.)
- Discharge plasma control (Maeyama and Inada Lab.)
- Research and development of electrical insulation and discharge control technology in vacuum and high-performance fuses (Yamano Lab.)
- Development of 1-Dimensional Quantum Nanowire Thermoelectric Conversion Element (Hasegawa Yasuhiro Lab.)
Robot control field (EV, welding robot, motion control, deep learning )
- Clean and safe energy transmission in magnetic applications (Kaneko Lab.)
- Development of high dynamic range 6-axis force sensor capable of measuring up to 1g weight (Tsuji Lab.)
- Visualization and Control of Welding Phenomena (Yamane Lab.)
Information Communication and Circuit Field (Wireless communications, 5G, millimeter-wave, microwave, antenna, system creation, ITS, integrated circuits, optical measurement)
- High Performance LSI Design and Design Automation (Ito Lab.)
- Social and industrial infrastructures’ advance based on ICT and IoT (Hasegawa Takaaki Lab.)
- Research and Development of Microwave and Millimeter Wave Circuits for Wireless Communications (Ma, Ohira and Misawa Lab.)
- Research and Development of Microwave/Millimeter-Wave Band Passive Circuits (Ma, Ohira and Misawa Lab.)
- Accurate and fast solver for electromagnetic problems based on integral equation method, and its application to eigenvalue problems (Ma, Ohira and Misawa Lab.)
- High-performance planar antenna (Kimura Lab.)
- High-Speed Non-Contact Non-Destructive Optical Inspection System for 3D Objects (Shioda Lab.)
- IT-based systems innovation for human mobility sophistication (Manabe Lab.)
Materials and devices (sensors, photonics, solar cells, spintronics, ferromagnetic materials, SiC semiconductors, superconductivity, biomedical measurement) )
- Toward the Development of "robotic sniffer" (Uchida, Hasegawa and Shimizu lab.)
- Development of Sensing Technologies for Food and Agriculture (Uchida, Hasegawa and Shimizu lab.)
- Development of high-sensitivity sensor using carbon material and physical property measurement (Uchida, Hasegawa and Shimizu lab.)
- Improved efficiency by capturing hidden real criminals "defect level" with light!: Development of High-Efficiency Light-Emitting Materials and Light-Emitting Devices (Kamata Lab.)
- Spintronics Study Using Bipolar Conductors in which Holes and Electrons Contribute to Conduction (Sakai and Yoshizumi Lab.)
- Research on quantum devices composed of rare earth compounds and transition metal compounds (Sakai and Yoshizumi Lab.)
- Development of Thin Film Fabrication Technology and Device Applications (Shirai and Ishikawa Lab.)
- Perovskite Solar Cells (Shirai Ishikawa Laboratory)
- Research and development of leading-edge superconducting detectors and sensors (Myoren and Naruse Lab.)
- Development of Ultra-High Sensitivity Detector Utilizing Superconducting Properties (Myoren and Naruse Lab.)
- Fabrication of semiconductor quantum nanostructures and evaluation of optical properties with the aim of application to next-generation photonics devices (Yaguchi and Yagi Lab.)
- Development of Semiconductor Nanostructure Fabrication Technology for Next-Generation Optoelectronic Devices (Yaguchi and Yagi Lab.)
- Research on Ferromagnetic Thin Films with Fine Structures (Kakizaki Lab.)
- Material search using common elements (Kamishima Lab.)
- Research on Ultra-High Performance Photon Detector Using Superconductors and Its Implementation (Taino Lab.)
- Stronger than Si and more device friendly than diamond SiC semiconductors (Hijikata Lab.)
- Magnetic Studies in Metal Complexes (Honda Lab.)
- Research on Light-Emitting/Receiving Devices Using Semiconductor Materials (Fujikawa Lab.)
Keyword : Large scale integrated circuit, design automation, image processing, parallel processing, low power consumption, design search, architecture for LSI
Research Appeal Points : High-performance LSI design that takes advantage of the features of processing that is desired to be implemented in LSI, parallel acceleration of still image and moving image processing for LSI implementation, and LSI design automation by searching for general-purpose processing methods that combine annealing and integer programming
Research Overview : LSI (large-scale integrated circuit) isadigital circuit made by combining nanoscale circuit elements (Transistor) with semiconductor crystal pieces. It is incorporated in various information communication equipment, home appliances, automobiles, etc., and is responsible for signal processing, image processing, numerical calculation, control, and storage. LSI improves processing performance by parallel processing utilizingalarge number of devices. We have identified the characteristics of the processing that we want LSIs to perform and devisedaprocessing method that can execute LSIs at high speed and with low power consumption, thereby proposing high-performance LSI designs. We are also developingamethod to automatically design LSIs with the best area, speed, and power consumption inashort period of time by using computers to search for the combination of execution order and allocation ofalarge number of operations involved in processing.
Uchida , Hasegawa and Shimizu Lab. (Uchida)
Keyword : Olfactory sensor, 2D electrochemical sensor, guided sniffer dog, detection dog, machine learning, IoT, 5G
Research Appeal Points : In order to obtainalarge amount of information for the sense of smell, the function of two-dimensional chemical image sensors is important. This is the world's first technology that enables current measurement instead of conventional voltage measurement.(Patent No. 4560633p4560633)
Research Overview : It has become possible to bring the senses of machines closer to the five senses of humans. Among the five senses, "sense of smell" is very important to know the situation around you, but you need to distinguish certain smells in your daily life, which is filled with various smells. Ifasensor withasense of smell comparable to that ofadog can be realized, it will be possible to realizea"sniff guide dog" that assists daily life with odors anda"detection dog" that searches for hidden objects. I am working on the development ofanew sensor technology called "two-dimensional electrochemical sensor" and research on applying it to olfactory sensors. We aim to detect various kinds of odors with high sensitivity by capturing them as large-area images. We believe that the addition of machine learning, IoT, and 5G communication will increase the possibility of artificial smell.
Keyword : optical interferometry, light scattering, laser speckle, speckle interference, optical tomographic imaging, plant growth measurement, plant environmental stress
Research Appeal Points : The statistical interferometry is the only measurement method in the world based onacompletely new principle using the complete randomness of the scattered field as a standard, and it is possible to measure the displacement of subnanometer. Further, since the present invention can be applied toascattering object, its application range is extremely wide.
Research Overview : "We are developing measurement methods using light and conducting research on its application to environmental measurement. In particular, interferometry enables highly sensitive measurement. We are developing the Statistical Interferometry (SIT), an ultra-sensitive optical interferometry based on statistics of the scattered field of laser light. The advantage of SIT is that it can be applied to scattering biological samples, whereas conventional interferometry is limited to specular objects such as lenses. We applied SIT to measure the growth dynamics of plants inavery short time, and studied the response of plants under environmental influence onasecond scale. Asaresult, we have established technology to detect the effects of pollutants such as ozone and heavy metals within minutes to hours. In addition, we use optical tomographic imaging to monitor the effects of the environment on plant interior. "
Keyword : Contactless Power Supply, Wireless Power Supply, Electric Mobility, EV, Welding Robot, Electrical Equipment, Power Electronics
Research Appeal Points : Theoretical Analysis for Various Resonant Capacitor Systems for Designing Contactless Power Supply Systems/Development Results of Highly Efficient and Miniaturizable Contactless Power Supply Pad Shapes/R & D of Power Supply Systems during Parking and Traveling for EVs, Electrically-assisted Bicycles, etc.
Research Overview : Contactless power supply, which is attracting attention with the spread of electric vehicles (EV), isatechnology that can safely transmit energy regardless of contact failure. In principle, this isatransformer withalarge air gap, in which alternating current is applied to the primary coil to generate magnetic flux, which is transmitted to the secondary coil to generate induced electromotive force (electromagnetic induction). Our laboratory has publishedanumber of papers on the comparison of input/output current voltage characteristics and the derivation of maximum efficiency conditions based on the resonant capacitor connection method, and is focusing on the development of contactless charging systems that are effective for electric mobility, such as EVs and power-assisted bicycles. We are also conducting research on advanced and intelligent welding equipment, such as high-performance arc welding robots that use external magnetic fields as magnetic applications.
Keyword : Quantitative evaluation method of defect level without electrode, efficiency improvement of LED laser, phosphor, solar cell, etc. from deep ultraviolet
Research Appeal Points : The location and energy distribution of defect levels can be quantitatively measured by non-contact and non-destructive measurement without the need for electrodes. There are no restrictions on the sample structure and shape (From local evaluation to entire wafer surface), and it can be applied to light emitting/receiving elements, phosphors, electronic elements, etc., and there are many results.
Research Overview : "The widespread use of LED lighting contributes to energy conservation, and solar cells are also expected. is that we need to createamodern society What is needed to further improve the efficiency of the light emitting and receiving elements that support it? watchful Even if a crystal is grown,aslight disturbance of the crystal (crystal defect) formsalocalized level and electrons are generated. and holes are trapped, reducing the efficiency of the device. This "defect level" is the truth. The killer! The method to find it is indispensable. In the "Two-Wavelength Excitation Photoluminescence method" developed by our laboratory, 2 of different wavelengths We use excitation light to find the real culprit inanon-contact and non-destructive manner. Be guided by these guidelines By reducing the defect level density through optimization of the material, structure and process, This makes it possible to increase the efficiency and life of the child. "
Sakai and Yoshizumi Lab. (Sakai)
Keyword : Spin, Spin Hall Effect, Logic Gate, Bipolar Conductor, Rare Earth Element, Hydrogen Occluder, CMOS
Research Appeal Points : "It is theoretically clear that spin flow can occur autonomously when properties other than charge are nearly equal between electrons and holes. I did.aphenomenon corresponding to this prediction was found in the Hall effect of yttrium dihydride. "
Research Overview : "How convenient would it be if portable information processing devices could operate on solar cells alone, like pocket calculators? I did. This is the result of research aimed at significantly reducing the power consumption of the latter. We are focusing on the theme of "the future.". The reason why we focus on spin is that the motion of electrons is not only current, but also magnetic momentum. (g) bringing about the flow of energy and information (This is called spin flow.), and if they are used appropriately, the storage and transportation of energy and information This is because there isapossibility that transmission can be realized with extremely low power consumption. In addition, we have developedasystem for the effective use of hydrogen energy using rare earth metals. We are working on utilization research from the viewpoint of spin flow. "
Shirai and Ishikawa Lab. (Shirai)
Keyword : Crystalline Si/Perovskite Solar Cells, Thin Film/Interface Properties, Thin Film Fabrication Technology
Research Appeal Points : "Application to crystalline Si-based solar cells and thin film transistors by coating process, development of atomization coating and mist-CVD method, Spectroscopic ellipsometry. "
Research Overview : "Through the development of inorganic, organic, and polymer thin film fabrication technologies and the evaluation of thin film and interface properties, we have developed solar cells, sensors, and electric field effects. Applications of transistors and optical and electronic devices are being tackled. "
Takaaki Hasegawa Laboratory
Keyword : Systems Innovation, Intelligent Transport Systems (ITS), Quality of Spatial Comfort (QoSC), Apparel Preference Information Extraction, Virtual Planning Office (VPO)
Research Appeal Points : We always try to create a new way of thinking that has never existed before. We have been conducting many joint research projects with companies.
Research Overview : Research in Takaaki Hasegawa laboratory is based on real world’s IT; it includes creation of systems for social and industrial infrastructures related to mobility and the apparel fields. "The systems innovation theory" regards both sides of "lifestyle and sense of values" and "fundamentals of science and technology and mathematical physics" important to create systems accepted by society. The quality of spatial comfort (QoSC) is also an important element for consideration of research themes. The specific research subjects include mobility of people and things as well as consumers’ preference information extraction in apparel fields. In the mobility field, we have argued importance of "P/SV/V three modal traffic society" and have researched safety of connected cars. On the other hand, in the apparel field, we have proposed the virtual planning office (VPO) that the extracted preference information is used for consumers’ preferable apparel production.
Ma, Ohira and Misawa Lab.
Keywords : Wireless, 5G, IoT, Microwave, Millimeter Wave, Passive Circuits, Filters, Power Dividers
Research Appeal Points : We receive research grants from many governments, foundations, and companies. The research results have been presented as invited papers in several journals in Japan and overseas and as invited lectures at conferences, and have been awarded at many conferences and conferences including the 2017 Best Paper Award of the IEICE.
Research Overview : As wireless communication technology and applications increase in speed and capacity, efficient use of existing frequency resources and exploitation of unused high-frequency resources are being promoted. Through research on high-frequency circuits that are essential for wireless communication devices, this laboratory is working to develop various new businesses using radio waves and to solve new problems associated with the shift to higher frequencies. Research has been advanced from basic theory to engineering applications, including the proposal of circuits with excellent functions, the elucidation of their electromagnetic wave phenomena, and the construction of new design methods, and small, high-performance, multifunctional microwave and millimeter wave passive circuits, especially filters, antennas, power dividers, and their combined circuits have been developed.
Maeyama & Inada Lab. (Maeyama)
Keyword : Atmospheric Pressure Discharge, Active Species, Hydroxyl Radicals, Ozone, Pulse Power Supply
Research Appeal Points : "The atmospheric pressure discharge plasma of interest can be generated and maintained byarelatively simple power supply, and it is possible to generate and decompose ozone and nitrogen monoxide. Hydroxyl radicals usable for water treatment or the like can be produced in large quantities. "
Research Overview : The plasma state hasatemperature in excess ofafew 1000 ° C and is highly reactive. It is also characterized by excellent controllability. To conventional production below 1/100 atm It was mainly produced under limited conditions, but it was possible to produce it under atmospheric pressure. Applications to the body and decomposition of environmental pollutants are expanding. We have focused on micro-cathode hollow discharges and spherical lightning discharges. To improveageneration method and physical characteristics such as electron density and temperature ofagenerated plasma We are conducting research on evaluation and performance evaluation of applied technologies using them. Special power supplies for generating and maintaining these special conditions in parallel In order to make the pulse power supply portable and high in performance, Development research is also carried out. "
Myoren and Naruse Laboratory (Myoren)
Keyword : Superconductive Detector, Superconductive Sensor, Superconductive Imaging Array, Superconductive Electronics Super High Speed Signal Processing Circuit
Research Appeal Points : "Superconducting detectors that outperform semiconductors, superconductive sensors, and superconductive digital signal processing circuits Asaresult, we are researching and developing detectors and sensors that can be used in the most advanced fields. "
Research Overview : "Computer-Assisted Design Environment, Trial Production Environment with Simple Clean Room, and Measurement Environment with Non-Refrigerant Mechanical Refrigerating Machine" including photon detectors, mainly from infrared to radiation, and highly sensitive detectors, such as sub-millimeter and terahertz (THz) waves We are researching superconducting detectors and superconducting sensors capable of detecting weak signals. Superconducting electronics Arraying of photon detectors, expansion to photon number detectors, and imaging of highly sensitive detectors with signal processing circuits that make full use of We are working on layering. Some research is conducted by RIKEN, National Institute of Advanced Industrial Science and Technology, Nanjing University in China and Italy. We are conducting joint research with the University of Naples and other domestic and overseas research institutions. "
Yaguchi and Yagi Lab. (Yaguchi)
Keyword : Photonics, optical properties, epitaxial growth, compound semiconductors, nitride semiconductors, quantum nanostructures
Research Appeal Points : Based on dilute nitride semiconductors with unique properties by fabricatingasemiconductor quantum nanostructure Next-generation photonics outperforming existing devices We are aiming to realizeaX device. "
Research Overview : "Semiconductor Epi for Next-Generation Photonics Devices" Process techniques for tachytic growth, optical property evaluation, and device fabrication I'm doing research on techniques. In particular, the amount ofasemiconductor produced by using an epitaxial growth technique By evaluating child nanostructures using various methods, we have developedanew type of solar cell with high efficiency. Development, single photon for quantum information technologies such as quantum cryptographic communications Generation of entangled photon pairs and opening of high-efficiency light-emitting devices We promote research that leads to development. "
Ma, Ohira and Misawa Lab. (Ohira)
Keyword : Microwave, millimeter wave, filter, antenna, electromagnetic wave, passive circuit
Research Appeal Points : "Devisinganovel microwave circuit through the elucidation of physical phenomena in electromagnetic circuits. New theories and design techniques have been developed for this purpose, as well as microwave circuits. We are consistently working on everything from antenna design to experimental verification. "
Research Overview : Microwaves areakey hardware component in wireless communications. Theory and analysis of wave band passive circuit (Filters, antennas, composite circuits, etc.) I'm studying design. The microwave and millimeter wave band isasmart form. This is the frequency band used for various wireless communications such as wireless LAN, satellite communications, etc. In recent research,afilter withafrequency selection function and the radio wave radiation of an antenna are used. filtering antenna with additional functions and frequency selection by simply applying voltage To improve the functionality of filters such as tunable filters with varying selectivity Research and future microwave filters using neural networks we are conducting research on automatic design technologies. "
Keyword : Ferromagnetic substance, Ferroelectric substance, thin film, electronic device, hard disk drive, RFID, electromagnetic wave absorbing sheet, ME effect
Research Appeal Points : "The thin films we make are not only thinner, but also microfabricated. By devising the structure, it aims to express new functionality. metaphor Then, there isagranular structure in which ferromagnetic particles are embedded in resin. "
Research Overview : "Magnetic materials such as magnets are called ferromagnetic materials. In the laboratory, this material is made intoathin film withathickness of several hundred to several tens of nanometers. To develop new characteristics and to consider applications to various electronic devices in the United States. Specifically, the following are used forahard disk drive. To improve reception sensitivity of IC tags (RFID) represented by SUICA, which areamemory medium. and noise reduction sheets. And recently, electricity and magnetism. Asadevice capable of directly converting air,alaminated structure ofaferromagnetic material andaferroelectric material is used. We are also involved in the development of new composite materials that exhibit magneto-electric effects (ME effect). window. "
Keyword : Microstrip Antenna, Waveguide Slot Antenna, Electromagnetic Field Analysis
Research Appeal Points : "New planar antenna technology with various functions We are promoting research from both aspects of experiment and experiment. "
Research Overview : "Services using radio waves such as TVs and smartphones are not suitable for daily life. It is the social infrastructure that we lack. Radio waves play an important role asafundamental technology in the information society We are expanding the spectrum, but we are running out of frequencies that are easy to use. Therefore, further improvement of frequency utilization efficiency and its use have not been realized. The development of quasi-millimeter-wave waves is an important issue. Therefore, in our laboratory, We focus on the development of new planar antenna technology. Plane An Tenna can be processed by using dielectric substrate, so mass production is possible at low cost. It is possible and it is easy to develop various application technologies. New Knee In order to cope with this problem, the planar antenna is made multiband, miniaturized, and We are working on themes such as broadband and variable characteristic technologies. "
Keyword : Oxide magnetic materials, 3d transition metal compounds, Resource strategy
Research Appeal Points : "In material exploration, changing one way of combining elements can greatly change the results. Even the combination of just three elements There is something that has not been checked. We believe that the mission of the Group is to actually create and study these materials. "
Research Overview : "Our research goal is to create functional materials from common elements. The characteristics of common elements are: It is naturally abundant, inexpensive and easy to procure. Therefore, we are synthesizing and searching for functional materials, mainly iron oxides. both iron and oxygen exist near the earth's surface (Clark number) is the 4th and 1st most common element, respectively. an oxide of iron (red rust) with an oxide of another element When it is mixed and hardened, it becomes magnetic ceramics. This is one of the typical practical magnets, "Ferrite" Yes. In our laboratory, we have developed new oxide functions by converting elements other than iron and oxygen into calcium (Clark number five). We are searching for materials with the aim of producing materials. "
Keyword : Optical measurement, single-shot 2D tomography, spatial resolution spectrum, OCT (optical tomographic imaging), high-speed measurement
Research Appeal Points : You can:.
In-line defect inspection, shape inspection of moving objects such as vibrations, large-area surface shape inspection, internal structure inspection of transparent objects, total inspection, and patent applications have been filed. "
Research Overview : "In manufacturing production lines, all product surfaces and paint surfaces are missing to maintain quality and reliability. Invagination is essential. However, with existing measuring instruments, the inspection speed is slow or it is difficult to detect the vibration environment. There isareality that practical application is not progressing due to weakness. In order to overcome these problems, our laboratory uses light to non-contact two-dimensional tomographic images. I am studying the technology of imaging by LeShot. Realistic cross-section of the depth in the direction of illumination Accurate inspection of surface shape and internal structure with micron precision, even inavibration environment, since imaging can be done in time. capable of being done. In addition, since the principle of optical interference is used, the position, structure, and layer It is also possible to obtain information specific to the substance constituting the object such as spectrum and dispersion for each object. "
Keyword : Superconducting devices, photon sensors, packaging technology
Research Appeal Points : Design, manufacture, and photon detection/measurement of superconducting sensors in the laboratory. dialogue box opens. Research is not closed within the university, and research institutions and other universities in Japan and abroad and we are actively engaged in joint research and making efforts toward its practical application. "
Research Overview : Photon detectors using superconductors have been developed using conventional semiconductors and metals. It has higher sensitivity, higher resolution and faster operation than the Nsa. This is because To be able to see objects that have been blurred or not seen. and. There arealot of different ideas for the detectors we're working on. It can also be used for the detection of terahertz waves and neutrons, and for quantum information and communications. It is possible and is expected to be applied to various fields. In addition, with an eye to practical use, it is super. We are also working on three-dimensional mounting technology for conductive devices. Specifically, A chip on whichasuperconducting device is placed andasuperconducting wire for connecting the chip We also conduct research on the elemental technologies that connect the placed chips. "
For more information : Researchers Database
Keyword : Robotics, Motion Control, Force Sensors
Research Appeal Points : The ability to detect both small and large forces is essential for robots to perform skillful movements like humans. HDR force sensors are the foundation of the robot revolution to overcome this challenge.
Research Overview : "Smaller force range and larger force range due to the introduction of multistage structures. We have realizedahigh dynamic range (HDR) force sensor that can measure both. It is the world's first 6-axis (3-Axis translational and 3-Axis rotational forces) force sensor and can measure from 1 g to 100 kg. It is now possible to measure forces as small as 1/10 of the previous model. "
Yasuhiro Hasegawa Lab.y
Keyword : thermoelectric conversion, nanowires, quantum effects, nanofabrication, precision measurement
Research Appeal Points : This research laboratory is focused on the thermoelectric device which introduces the quantum effect using quantum nanowire, possessing nano-scale diameter and millimeter-scale length to achieve high energy efficiency based on solid-state physics, nanofabrication, precision measurements, and modeling.
Research Overview : Demands of clean energy for realization of an ultra-low carbon society using a renewable new energy source, a phenomenon of thermoelectric conversion which enables to convert heat to electricity directly is one of the key technologies; however, the energy efficiency is still lower than 10 % using conventional materials. To overcome this obstacle, one-dimensional nanowire has been developed in this laboratory to introduce quantum effect for improving the efficiency dramatically, being more than 30 %. Sophisticated fabrication and measurement techniques have been simultaneously developed, and theoretical model has also been proposed for the analysis of experimental results based on the Schrodinger equation.
Uchida, Hasegawa and Shimizu Lab.(Hasegawa)
Keyword : Plant Bioelectric Potential, Biometric Engineering, Plant Factory, Taste Sensor, Food Safety and Security, Environmental Monitoring
Research Appeal Points : "It is possible to cultivate more delicious and nutritious plants with high efficiency. Environmental monitoring and control by plant bioelectrical potential, and daily The results of research on taste sensors, which are also useful for quality control of foods, etc. Make our food and agriculture richer! "
Research Overview : We are developing sensors and sensor systems for environmental control and food taste evaluation. E.G., depending on the physiological activity of the plant The "bio-potential" is regarded asasensor which shows the environmental recognition ability of plants, and the bioelectric potential is measured like human brain wave and electrocardiogram. Thus, the health condition and cultivation environment of plants cultivated in plant factories are evaluated, and the cultivation environment is evaluated. we are working to establish technologies for optimal control. We are also researching taste sensors to evaluate the taste of foods. Our sense of taste is very sensitive. is subjective and objective for food product development, quality assessment, etc. Evaluation is essential. Therefore, taste is quantified and evaluated objectively. We are working on the development ofataste sensor that can detect the taste. "
Hijikata Lab.keyword :SiC semiconductor, MOS junction devices ,power devices, hard electronics, quantum devices
Research Appeal Points : Realization of radiation-resistant switching devices with more than 100 times long lifetime compared with conventional Si devices using SiC semiconductors. Generation of single-photon/spin sources in SiC Semiconductors and their applications to quantum effect devices
Research Overview : Silicon carbide (SiC) can form a Si oxide (SiO2) film on its surface by thermal oxidation and its device fabrication technology has been matured, as well as its 6 inch-scale wafers have been in mass-production, which enables us to easily develop semiconductor devices similarly as Si material. In addition, SiC also has properties similar to diamonds such as wide bandgap, high radiation and heat resistance, and robustness. Indeed SiC has "both advantages" of Si and C (diamond)! Furthermore, researches over the last few years have shown that SiC has single defects that closely resemble diamond. By using these single defects as single-photon or electron spin sources, the roads to quantum computing, quantum photonics and quantum sensing are opened.
Keyword : material science, magnetic substance, metal complex
Research Appeal Points : "I study material science from the viewpoint of magnetism. To consistently search for and synthesize substances and evaluate physical properties to obtain useful substances The characteristic of this research is that it aims at. "
Research Overview : "Metal complexes composed of metal and organic molecules haveamagnetic interaction that aligns spins on the metal via organic molecules. It can beamagnetic material. This magnetic interaction, calledasuperexchange interaction, generally causes spins on adjacent metals to be antiparallel In most cases, the metal complex becomesaweak magnetic substance (antiferromagnet). However, certain conditions (molecular In some cases, the spins are aligned in parallel under the type and arrangement), and thusaferromagnetic material can be obtained. In previous studies, water molecules or hydroxide ion bonds between the metals ata90 degree angle, or when the metals are arranged periodically in the carbon nitride sheet. It was discovered that magnetic interaction appeared, and the guideline for obtaining the material which shows ferromagnetism in the metal complex was clarified. "
Yaguchi and Yagi Lab. (Yagi)
Keyword : Semiconductor crystal growth, semiconductor thin film, quantum well, quantum dot, quantum wire, quantum structure solar cell
Research Appeal Points : High Quality Crystal Growth of Diluted Nitride Semiconductors Using Nitrogen δ Doping
Realization of Ordered Structure of InN/GaN Quantum Dots with Precise Control of Size, Density and Crystal Structure by Self-Organizing Growth
Research Overview : "We are conducting research on semiconductor crystal growth and optoelectronic devices using molecular beam epitaxy. Especially with group III elements Nitride semiconductors, which are compounds of nitrogen, and diluted nitride semiconductors, which are III-V semiconductors such as GaAs, to whichasmall amount of nitrogen is added, are used. At the center isasemiconductor crystal withananometer (1/1 billion meter) scale fine structure (quantum well, quantum dot (g) quantum wires). We also investigate the electrical and optical properties of these nanostructures. The research is aimed at applications such as new solar cells that operate using physical phenomena unique to nanoscale materials. "
Keyword : High Voltage Engineering, High Current Break, Vacuum Isolation, Fuse
Research Appeal Points : "Insulation and protection technologies enable safe and secure use of electricity. to do this. this technology Now, we have to control the discharge, Electricity isafast, transient stochastic phenomenon. We are We study this problem every day. "
Research Overview : "We are researching electrical insulation and protection technologies. In particular, we are conducting research on vacuum insulation using "vacuum". Today, Advanced Science An increasing number of equipment and power equipment use vacuum. These devices often use high voltage in vacuum. Discharge and dielectric breakdown are problems. In the laboratory, the basic process of vacuum discharge and the excellent insulation performance of vacuum are extracted to the maximum. I'm doing some research. We also conduct research on electrical protection devices such as fuses and circuit breakers. When the electrical insulation is broken,alarge current flows and immediately shuts it off. Otherwise it will lead toabig accident. In order to ensure safety, it is important to developahigh performance current interrupting device. We conduct research and development of devices and fuses. "
Shirai and Ishikawa Lab. (Ishikawa)
Keyword : Thin Film Solar Cell, Solution Process, Crystal Structure
Research Appeal Points : Addition of high boiling point, low vapor pressure additive solvent and appropriate amount of Lewis base Thus, the perobus havingalarge particle diameter and high crystallinity is easily obtained. A kite thin film is formed, and 20% or more is obtained by modifying the interface. A solar cell with high photoelectric characteristics was fabricated. "
Research Overview : "Lead and tin are inorganic, halogen elements such as iodine and bromine, and alkylammonium is organic. Organic and Inorganic Hybrid Perovskite Crystals Composed of Ions as Light Absorbing Layers A perovskite solar cell was used. Perovskite solar cells areamassive device It is possible to formafilm atalow temperature byasolution method without using it, and its structure isatransparent conductive film on glass and an acid. Titanium oxide,aperovskite layer, an organic semiconductor, andasilver electrode are laminated. It is extremely thin withathickness of 1 μm and is resource saving. In our group, control of the crystal growth process and pero 20% by modification of the interface between the bskite layer and the organic semiconductor A high photoelectric conversion efficiency is obtained. "
Maeyama and Inada Lab. (Inada)
Keyword : Discharge Plasma, High Voltage Engineering, High Power Engineering, Plasma Applied Engineering, Advanced Measurement
Research Appeal Points : "Pioneeringanew phase of discharge plasma with the following approach.
(1)Development of advanced diagnostic methods with high versatility (2)Search for new phenomena using diagnostic methods (3)Optimization and New Practical Application of Applied Technology Based on Understanding of Phenomena
Research Overview : In modern society, both the positive and negative aspects of discharge plasma are our safety and security. It's closely related to life. Here, the possibility of the discharge plasma is maximized or the discharge plasma is restored. The discharge plasma must be able to be controlled as desired in order to minimize clogging. However, the discharge plastic Zuma conditions are very sensitive to the environment in which they occur, and it is currently very difficult to control their nature. Koshi In order to control the properties of various discharge plasmas, we measured the discharge plasmas in detail and developed the properties. The research which clarifies the mechanism is carried out. "
Uchida, Hasegawa and Shimizu (Shimizu)
Keyword : Quantum Sensor Diamond Carbon Nanotube Thermoelectric Conversion
Research Appeal Points : Development of Sensor Utilizing Unique Properties of Carbon Material and Nanophysical Property Measurement Using the Sensor
Research overview : The goal of this research is to develop new sensors and devices by utilizing the unique electrical, thermal, and optical properties of carbon materials such as diamond, which is well known asagemstone, and carbon nanotubes, which are attracting attention as materials supporting nanotechnology. The nitrogen vacancy center (NV center), which isadefect in diamond, is expected asasensor of magnetic field, electric field, temperature, etc., with higher sensitivity and higher resolution than before.
Myoren and Naruse Laboratory (Naruse)
keyword : superconducting detector, millimeter wave astronomy, radiation detector
Research Appeal Points : Do not cool the device to operate the superconducting detector. but if you need high sensitivity and high speed operation, It has more than enough advantages to make up for its shortcomings. "
Research Overview : "Utilizing one of the properties of superconductivity, it is more than 1000 times more sensitive than conventional semiconductor detectors. We are developingadetector. This detector can detect millimeter waves (meV) to radiation (MeV). A very wide range of energy can be detected up to. Today's main applications are ultra-sensitive, such as millimeter-wave astronomy and high-energy physics. Basic science. As illustrated in Research Introduction Illustration 1, the Atacama Plateau in the Republic of Chile with an ASTE telescope at the University of Michigan, I did. To enable not only basic science applications but also visualization of radiation and identification of radioactive materials at the same time. We are also developing radiation cameras like this. "
Research Appeal Points :
Research Overview :
For more information : Researcher Database
Keyword : ITS (intelligent transportation systems), LBS (location-based services), Localization, Navigation, Driving Safety Support, Smartphone
Research Appeal Points : Our laboratory is aims to sophisticate human mobility by realizing seamless positioning and innovating new services.
Research Overview :With the spread of smartphones, various location-based services (LBS)
The effectiveness of all location-based services is influenced by the
positioning performance on the smartphones.
Our laboratory focuses on the systems sophisticating human mobility and
carries out our research by the following two approach.
(1) Sophisticating the smartphone positioning sub-platform for realizing seamless positioning with high-accuracy and high-precision.
(2) Innovating new location-based services for slow mobility such as pedestrian, bicycle, and small vehicle.
Ma, Ohira and Misawa Lab. (Misawa)
Keyword : Computational electromagnetics, Wave scattering problems, Integral equation method, Eigenvalue problems, Fast solvers
Research Appeal Points : One of the notable applications of integral equation method is the calculation of eigenvalues in open spaces. As a matter of fact, eigenvalues in open spaces are of interest, because they do relate to physical phenomena. Recent studies reveal that eigenvalues in open spaces are also related to the numerical performance of the integral equation method.
Research Overview :I study (boundary) integral equation method, which is one of powerful electromagnetic solvers. This method is especially advantageous in solving wave scattering problems in open spaces, because the calculation is required only on the surface of the target and the obtained solution automatically satisfies the condition of wave in the open space without introducing additional tools. On the other hand, the integral equation method may suffer from inaccuracies nearby specific conditions called ``fictitious eigenvalues". In addition, the integral equations are discretized into linear equations whose coefficient matrices are dense, which results in costly computation. I thus study good formulations and fast solvers of the integral equation method to improve the accuracy and accelerate the calculation. I am particularly interested in the application of the integral equation method to eigenvalue problems in open spaces.
Kadono and Lim Lab. (Lim)
Keyword : Optical coherence tomography, plant growth measurement, biometry
Research Appeal Points : "Our research shows the anatomical information and cells of deep tissues of plants witharesolution of more than 10 microns without destroying the object and without contact. We are developing Biospeckle Optical Coherence Tomography (bOCT) to visualize activities in three dimensions. "
Research Overview : "Agricultural production sites are working on cultivation methods that precisely manage the growing environment of crops. is essential to these practices, What we can't do is to monitor the growth of crops. We have developed optical measurement methods focusing on optical coherence tomography (OCT). We are researching and developingamethod for monitoring the growth status of crops using. OCT hasaresolution ofafew tens of microns and is deep in the body. This isamethod to image anatomical information of tissue in three dimensions, and it can be measured with high precision without destroying the object. There isapoint. Our research is based on the phenomenon of bio-speckle, which reflects the dynamic state of cells, etc., in plant cell activity. We are developing Biospeckle OCT (bOCT) to visualize. "
Sakai and Yoshizumi Lab. (Yoshizumi)
Keyword : Quantum device, field effect transistor, logical operation element, sensing system using machine learning/pattern recognition
Research Appeal Points : "We are conducting research on the synthesis and physical property evaluation of rare earth compounds and transition metal compounds as well as device applications. Further, the FET type sensor is provided. The research of molecular recognition by machine learning of sensor signal and development of the sensor has also been carried out. "
Research Overview : "We are conducting research on the physical properties of rare earth compounds and transition metal compounds and quantum devices using these properties. nanometer o The quantum size effect appearing at the D and dimensionally controlled structures such as nanosheets, quantum wires, and quantum dots are band dispersed and shaped. Research and logical performance of devices that are interested in effects on state density and physical properties and actively utilize quantum spin as well as electric charge It aims at the development as calculation element and sensor. In addition, field effect transistor (FET) type sensors and devices have been used so far. The research of the molecular recognition of the biomarker by the machine learning technology has also been carried out. "