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  • School of Engineering
  • Division of Electronic and Information Engineering
  • Department of Electrical and Electronic Engineering


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    Power Electronics and Electrical Energy Area

    Professor ISE Toshifumi   Associate Professor MIURA Yushi
    Power electronics is the key technology for future power systems with low environmental loads and efficient use of energy resources. Power technologies become to be closer and more friendly to people like mobile phones. This concept is called as ""Ubiquitous power"". Our laboratory members are working and studying for developing basic technologies based on power electronics and applied superconductivity for future power systems considering environmental problems and energy resource problems.
    • Future power delivery systems including many distributed generations with low environmental loads
    • Distributed generations and energy storages with high efficiency power conditioning systems
    • Application of next generation power semiconductor devices such as GaN
    • Power system controlling devices using power electronics

    Intelligent System Area

    Professor TAKAI Shigemasa   Associate Professor MIYAMOTO Toshiyuki   Assistant Professor HAYASHI Naoki
    Most existing systems consist of several components that operate concurrently. Such systems are called concurrent systems. We are interested in developing efficient techniques for verification, control, and optimization of concurrent systems using mathematical models. Our recent research topics include analysis and control of concurrent systems, control and scheduling of intelligent vehicles, modeling and verification of distributed software, and so on.

    Power Device Area

    Professor FUNAKI Tsuyoshi   Associate Professor SUGIHARA Hideharu   Assistant Professor IBUCHI Takaaki
    The research works in our laboratory aim at energy saving, miniaturization, and improving performance of power conversion system, which are based on the simulated analysis with evaluating and modeling of loss in power conversion circuit, electromagnetic noise caused by switching operation, and temperature rise by dissipated loss. To this end, the elements of switching device, passive component, and JISSO technology, which are used in the power conversion system, are evaluated and expanded to build system model.

    Systems Analysis and Optimization Area

    Associate Professor TATSUMI Keiji   Assistant Professor KUSUNOKI Yoshifumi
    In our area, we are developing new mathematical methods for systems analysis on the basis of theories in optimization and decision making; mathematical programming, game theory, soft computing (fuzzy theory, clustering, support vector machine, chaos theory, swarm intelligence, and rough set theory), and knowledge information processing. Moreover, we apply them to some practical problems.

    Intense Laser Science and Engineering Area

    Associate Professor HABARA Hideaki
    The interactions between high energy laser and plasmas create various plasma instabilities. Revealin the physics of the interactions can lead a critical impact on fast ignition scheme of laser fusion. Basic understaindig of plasma wall interactions in a laser fusion reactor is also studied. We use laser facilities at major institutes and universities in the world.

    Advanced Plasma Engineering Area

    Professor UEDA Yoshio   Assistant Professor IBANO Kenzo
    Materials are the key to unlocking nuclear fusion power as a safe and sustainable energy source. We study the incredibly complex interaction between fusion plasma and materials from both a fundamental and engineering point of view. From such framework, we pursue development of novel plasma generation technology and ion beam technology. Pulsed heat and particle loading effects on refractory materials are also our world leading research subjects.

    High Energy Density Sciences Area

    Professor KODAMA Ryosuke   Associate Professor OZAKI Norimasa   Associate Professor HOSOKAI Tomonao   Assistant Professor NAKAMURA Hirotaka
    We are exploring High Energy Density (HED) science with high-power lasers and x-ray free electron lasers(XFEL). Novel mater, material and devices are being developed utilizing the high energy density states, which has never existed at ambient condition on the earth:
    ・Development of a plasma photonic device and its applications
    Development of a laser accelerator with plasma fibers and its application such as a super transmission electron microscope and a table top XFEL, Intense THz radiation source with a plasma device and exploring of nonlinear optics in vacuum with a plasma mirror.
    ・Creation of matter and material in extreme states or high energy density solid states
    Control of extreme pressures conditions, resulting in creation of super-diamond, which could be harder than normal diamond, solid metallic hydrogen, which would contain a large density of hydrogen and other novel matter, which would be existed in the super earth. 
    These research subjects could not make progress only in the filed of photon science and plasma science but also in the large fields of sciences such as vacuum quantum physics, geophysics, material science, high pressure physics and chemistry, beam and other sciences.Experimental approaches on these studied are conducted using high power laser facilities including XFEL in the world under the domestic and International corporations.

    Advanced Beam Systems Engineering Area

    Associate Professor KATO Yushi
    Electron cyclotron resonance (ECR) ion sources have been widely used for production of high intensity multicharged ion beams for accelerator, heavy particle cancer radiotherapy, space propulsion, bio-nano material fields, as well as implantation in industrial applications. With promoting basic and applied researches of ECR plasma, we are conducting research and development with respect to new beam source responsible for the next generation.

    Fundamental Process-for-Functionalization Area

    Professor ITO Toshimichi   Associate Professor  SAKAI Kazuo   Assistant Professor  MAIDA Osamu
    In order to develop high-performance and/or energy-saving devices, we fabricate high-quality semiconducting diamond films having many excellent properties by using microwave-plasma chemical-vapor-deposition (CVD) method with methane gas, and pursue fundamental research to fabricate high-performance diamond detectors for deep ultra-violet lights, X-rays and γ-rays as well as diamond power electronics devices. Development and characterization of functionalized devices fabricated with oxides and perovskite materials is also a subject of investigation.

    Functional Materials Creation Area

    Professor MORI Yusuke   Associate Professor IMADE Mamoru
    In this area, developments of new functional materials that are candidate for a core technology in future low carbon, highly-sophisticated information and the aging of societies are performed. We aim to train researchers and give our findings back to these societies by fundamental researches of non-linear optical crystals, Nitride crystals, organic crystals and protein crystals, and practical realization of these materials through an academic-industrial alliance and venture creation.

    Nanomaterials and Nanocharacterization Area

    Professor KATAYAMA Mitsuhiro   Associate Professor KUBO Osamu   Assistant Professor TABATA Hiroshi
    This area researches the physics of surface/interface of the materials for nano-electronics, which underpin today's advanced information society from the hardware side.Especially, unique functions of low dimensional materials (2D nanosheets and 1D nanowires) like carbon nanotube, graphene, and other graphene-like layer materials, which are strong candidates for nanomaterials for next generation electronics, are explored and utilized for developing new applications such as sensor devices.

    Quantum Electronic Material and Device Area

    Professor YAGI Tetsuya

    Functional Molecular Materials and Devices Area

    Professor OZAKI Masanori   Associate Professor FUJII Akihiko   Assistant Professor YOSHIDA Hiroyuki
    The Functional Molecular Materials and Devices Laboratory (Prof. Ozaki Group) focuses on investigating the physical properties of molecular materials for applications in photonics and electronics. The group's main interests are in liquid crystalline materials that show unique properties as a result of the self-assembly of constituent materials, and p-conjugated polymers with the high functionality based on p-electron systems.

    Quantum Optoelectronic Devices Area

    Professor KATAYAMA Ryuji   Assistant Professor UEMUKAI Masahiro
    The area develops a series of quantum optoelectronic devices and systems: compact and energy-saving light sources with unachievable wavelength which contribute toward a low-carbon society, as well as ultra-high-speed quantum computation systems with high-degree of quantum superposition which enable the development of the new technologies such as big-data analysis and artificial intelligence. Current research targets are the fabrication of the nonlinear optical devices integrated with semiconductor lasers, quantum optical light sources made of wide-gap semiconductor, the exploration for the novel materials with huge optical nonlinearity, and the assembly of the above building-block devices into the novel systems.

    Engineering Science for Advanced Device Area

    Professor KONDOW Masahiko   Associate Professor  KAJII Hirotake   Assistant Professor MORIFUJI Masato
    Semiconductors lasers which are familiar as the light source of barcode readers are small and high-performance theoretically. Kondow lab is developing a circular resonator with the diameter of 1μm. The left figure shows the SEM image of the fabricated resonator, and right figure shows the light distribution in the resonator. At first, on a 2D photonic crystal structure, we fabricated the circular resonator where the light was confined and amplified. Then, a waveguide used for output was set near the resonator. As a result, a semiconductor laser without any energy loss can be fabricated. If this device is accomplished, we can realize the dream of achieving 100 times current communication capacity.

    Organic Electronic Device Area

    Professor OZAKI Masanori

    Integrated Quantum Devices Area

    Professor MORI Nobuya   Associate Professor MATSUOKA Toshimasa   Associate Professor KAMAKURA Yoshinari
    Our laboratory conducts theoretical research on novel materials and devices, and their applications in large-scale integrated electronic systems. The research topics cover a wide area from the basic semiconductor physics to the circuit and system design.

    Manipulating and Assembling Atoms and Molecules Area

    Professor MORI Yusuke

    Bio Systems and Devices Area

    Professor YAGI Tetsuya   Associate Professor HAYASHIDA Yuki   Assistant Professor SUEMATSU Naofumi
    The brains in animals realize intelligent computations on sensory information with algorithms and architectures that are quit different from those of the state-of-the-art digital computers. Our laboratort aims at investigating such computational principles and underlying mechanisms in the visual nervous system by utilizing various neuroscience methodologies, and at developing the bio-morphic electronic devices based on the knowledges from them. In addtion, we are recently making a strong effort to the basic research-and-development of the neural interface devices for artificial visual prostheses as the medical application.


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