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Semiconductor Quantum Nano Structures

　Semiconductor quantum nano structures are very promising for high-performance photonic devices such as lasers, modulators, and switches. Our research group is studying designing, fundamental optical properties, and fabrication technologies of quantum nano structures.

• Moleculer Beam Epitaxy (MBE)
• Potential-tailored quantum wells

Optical Modulators, Optical switches and related photonic devices and integrated photonic circuits

　We are studying compact, high-speed, low-power-consumption semiconductor photonic devices based on III-V compound semiconductor and silicon photonics for long-haul optical communication and optical interconnects, collaborating with Kokubun laboratory, Yokohama National University.

• Microring resonator (MRR) enhanced Mach-Zehnder modulators/switches
• Electroabsorption modulator based on multimode interferometer (MMI) waveguide
• Wavelength filter based on microring resonators (MRR)
• Splitting ratio tunable coupler based on multimode interferometer (MMI)
• Polarization-control devices
• Microring lasers / optical amplifiers and their application to optical logic circuits

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Highly-Sensitive Sensors

　We are studying highly-sensitive sensor devices based on silicon microring resonators such as protein sensors and hidrogen gas sensors, collaborating with Kokubun laboratory, Okazaki laboratory, Nishijima laboratory, Yokohama National University.

• Microring resonator (MRR)-based biosensors
• Microring resonator (MRR)-based gas sensors

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Plating Technologies

　We are studying electro-and electroless plating technologies and fabrication of fine metal patterns, transmission lines, and coils for electron and optical devices, collaborating with Prof. Honma group at Materials&Surface Engineering Research Institute, Kanto Gakuin University.

• Metal patterning on Si using electroless plating
• Fabrication of high-speed metal transmission lines on flexible substrates
• Fabrication of High-Q coil for wireless power supply using high-speed plating