Graduate School of Engineering Division of Electrical, Electronic and Information Engineering Department of Quantum Electronic Device Engineering
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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.
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.
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
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.
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.
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 OZAKI Masanori
Manipulating and Assembling Atoms and Molecules Area
Professor MORI Yusuke
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.