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

Power Electronics and Electrical Energy Area

Associate Professor HASHIMOTO Kazumune
Assistant Professor SHEN Xun

A typical existing control system consists of a physical system to be controlled and a controller implemented as a cyber system. Such a control system can be regarded as a cyber physical system in which s physical system and a cyber system interact with each other through communication network. We are interested in developing techniques for design, control, and optimization of cyber physical systems based on systems and control theory, computer science, and machine learning, and their applications.

Associate Professor IBUCHI Takaaki
Assistant Professor FUKUNAGA shuhei
Specially Appointed Researcher KINEMURA Hiroshi
Specially Appointed Researcher MIYAZAKI Tsuyoshii
Guest Professor NAKAMURA Takashi
Guest Professor SAKABE Shigekazu
Guest Associate Professor OKUDA Takafumi

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.

Professor USHIO Tomoo
Associate Professor TATSUMI Keiji
Assistant Professor Yuuki Wada

Today, human society is facing global environmental problems such as global warming. In this context, remote sensing technology is a fundamental technology to measure various variables related to the global environment. Accurate measurement, extraction and communication of information is one of the most important issues in building a safe and secure society. It has become a major part of the research and development of remote sensing systems. In this area, the research and development of remote sensing systems is the starting point for the research and development of new measurement methods. Throughout the course of the research, we develop a wide range of research from basic to applied, and from hardware to software.
In addition, as the mathematical treatment of “rational decision-making,” we are conducting research on systems engineering, mathematics and intelligent information He also conducts research in the interdisciplinary fields of academia and soft computing, including optimization, pattern identification, and His research interests include the development and application of chaos theory and group intelligence techniques.

Associate Professor HABARA Hideaki
Assistant Professor ABE Yuuki

We investigate extreme plasmas from laboratories to the universe, and develop the relevant fields of science, such as astrophysics, space physics, laser and plasma physics. Based on these we develop technological innovations leading to the medical and industrial applications. We conduct experiments with intense lasers, develop mass-production skills of nano-structure targets, and perform numerical simulations with super computers to understand the phenomena. We have broad and strong collaborations all over the world, including US, UK France, Germany, China, Taiwan, India, and also with domestic universities and institutions such as National Institute for Fusion Science, National Institute for Quantum and Radiological Science and Technology, and Institute of Laser Engineering.

Associate Professor LEE Heun Tae
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.

Associate Professor OZAKI Norimasa
Assistant Professor NAKAMURA Hirotaka

We are conducting research on the “Science of Extreme Conditions” using power laser technology, which is “High Energy Density Science”. This research field covers from the creation of scientific and technological innovations such as laser processing to the astrophysics including planetary science. High energy density science is attracting worldwide attention as a research field related to the creation of scientific and technological innovations as well as the creation of academia. In Japan, the Science Council of Japan proposed “Quantum leap jump in power laser technology and high energy density science and the creation of industry” on June 16, 2020. In such a situation, we are going to contribute to realize a sustainable and prosperous society and to open up future possibilities by exploration the unknown world through the research of high energy density science using high power lasers. The research is being promoted through domestic and international collaborations by using the most advanced large high- power laser facilities in the world including the XFEL.

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.

Assistant Professor ICHIKAWA Shuhei

Our research interests are centered on optical materials, especially wide bandgap semiconductors, with the aim of seeking and creating singular characteristics, device structures, and systems. Specifically, we are developing a gigabit-class deep-ultraviolet LED optical wireless communication system for 6G and a unique technology for characterization of semiconductors (ODPL spectroscopy). We continue to create innovative solutions through our integrated R&D process (from basic research to application and production).

Professor MORI Yusuke
Associate Professor IMANISHI Masayuki
Assistant Professor USAMI Shigeyoshi

In our material innovation area, we aim to create innovations in new functional materials that hold the key to solve the problems of future environmental problems and advanced information society. Especially, we develop new wavelength conversion optical crystals and nitride semiconductor crystals, and provide an education on these researches.
Our laboratory aims to contribute to society through training of researchers and development of functional materials by practicing from basic research to practical application through industry-academia collaboration and venture creation.

Associate Professor TABATA Hiroshi
Assistant Professor MAIDA Osamu

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.

Assistant Professor TANAKA Yutaro

Innovative biominerals area conducts education and collaborative medical engineering research on biominerals (bones, kidney stones, vascular calcification etc.) with the aim of “future medical innovation to support healthy aging” in an aging society. In vivo, bone and kidney stones are the stage where cells and proteins play an active role. Our primary focus is on these materials, and we use electronics technologies such as laser technology, ultrasound, and optical measurement to elucidate the mechanisms of biomineralization and to develop novel therapeutic and preventive methods for bone defects, kidney stones, and vascular calcification. Furthermore, we aim to develop new crystalline material synthesis technologies by applying biomineralization strategies.

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 π-conjugated polymers with the high functionality based on π-electron systems.

Associate Professor TANIKAWA Tomoyuki
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.

Associate Professor KAJII Hirotake
Guest Professor YAGI Tetsuya
Guest Associate 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.

Professor MORI Nobuya
Associate Professor MATSUOKA Toshimasa
Assistant Professor TANAKA Hajime

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.

Associate Professor KANEMOTO Daisuke
Specially Appointed Professor HIGASHINO Hidetaka

To achieve high performance large scale integration (LSI) systems, that will be fundamental key devices for next generation IoT/AI society, we develop ultra-low power and low voltage LSIs, energy harvesting systems, and bio- and physical-sensor interface devices.

Professor YAGI Tetsuya
Assistant Professor SUEMATSU Naofumi
Guest Professor HAYASHIDA Yuki

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.