Ryohei Takei

发表

Fabrication and Evaluation of MEMS Piezoelectric Vibration Sensor with Energy Harvesting Function

Toshihiro Itoh, Lan Zhang, Jian Lu, 2019, 2019 IEEE 14th International Conference on Nano/Micro Engineered and Molecular Systems (NEMS).

Wireless vibration sensing system powered by a piezoelectric MEMS vibration energy harvester

Hironao Okada, Toshihiro Itoh, Ryo Ohta, 2016, 2016 IEEE SENSORS.

Fine thickness control of amorphous silicon by wet-etching for low loss wire waveguide

Katsumi Furuya, Toshihiro Kamei, Makoto Okano, 2011, 8th IEEE International Conference on Group IV Photonics.

Sub-1 dB/cm submicrometer-scale amorphous silicon waveguide for backend on-chip optical interconnect.

Emiko Omoda, Toshihiro Kamei, Youichi Sakakibara, 2014, Optics express.

Silicon knife-edge taper waveguide for ultralow-loss spot-size converter fabricated by photolithography

Emiko Omoda, Toshihiro Kamei, M. Mori, 2013 .

Interlayer Polarization Beam Splitter Based on Asymmetrical Si Wire Directional Coupler

Yuki Atsumi, Makoto Okano, Tomohiro Amemiya, 2016, IEEE Photonics Technology Letters.

Vertical silicon waveguide coupler bent by ion implantation.

Tomoya Yoshida, Youichi Sakakibara, Masahiko Mori, 2015, Optics express.

Simulation of an ultralow-power power management circuit for MEMS cantilever piezoelectric vibration energy harvesters

Hironao Okada, Toshihiro Itoh, T. Kobayashi, 2016 .

S-shape spring sensor: Sensing specific low-frequency vibration by energy harvesting.

Toshihiro Itoh, Jian Lu, Ryohei Takei, 2016, Review of Scientific Instruments.

Design of piezoelectric MEMS cantilever for low-frequency vibration energy harvester

Hironao Okada, Toshihiro Itoh, Ryohei Takei, 2016 .

CMOS-compatible Vertical Si-waveguide Coupler Fabricated by Ion Implantation

Yuki Atsumi, Emiko Omoda, Tomoya Yoshida, 2016 .

Amorphous Silicon Photonics

Ryohei Takei, R. Takei, 2016 .

Direct Wafer Bonding and Its Application to Waveguide Optical Isolators

Tetsuya Mizumoto, Yuya Shoji, Ryohei Takei, 2012, Materials.

Development of energy harvesting MEMS vibration device sensor with wideband response function in low-frequency domain

Jian Lu, Toshihiro Itoh, Ryohei Takei, 2019, Microsystem Technologies.

Low-loss and low wavelength-dependence vertical interlayer transition for 3D silicon photonics.

Emiko Omoda, Yuriko Maegami, Toshihiro Kamei, 2015, Optics express.

Spot-size converter with a SiO(2) spacer layer between tapered Si and SiON waveguides for fiber-to-chip coupling.

Emiko Omoda, Yuriko Maegami, Toshihiro Kamei, 2015, Optics express.

Waveguide Optical Isolators for Integrated Optics

Tetsuya Mizumoto, Yuya Shoji, Ryohei Takei, 2012 .

Single-trench waveguide TE-TM mode converter.

Tetsuya Mizumoto, Yuya Shoji, Ryohei Takei, 2009, Optics express.

Pattern-effect-free all-optical wavelength conversion using a hydrogenated amorphous silicon waveguide with ultra-fast carrier decay.

Ken Tanizawa, Shu Namiki, Hitoshi Kawashima, 2012, Optics letters.

Effects of Wafer Precleaning and Plasma Irradiation to Wafer Surfaces on Plasma-Assisted Surface-Activated Direct Bonding

Tetsuya Mizumoto, Kohei Yoshida, Ryohei Takei, 2010 .