Ryohei Takei

Single-trench waveguide TE-TM mode converter

Sang-Hun Kim, Ryohei Takei, Yuya Shoji et al. · Optics Express · 2009 · 66 citations · Full text

Single Masking, Electronic Engineering, Conversion Efficiency +3

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

Ryohei Takei, Masao Suzuki, Emiko Omoda et al. · Applied Physics Letters · 2013 · 53 citations

Electrical Engineering, Engineering, Silicon Platform +10

Waveguide Optical Isolators for Integrated Optics

Tetsuya Mizumoto, Ryohei Takei, Yuya Shoji · IEEE Journal of Quantum Electronics · 2011 · 53 citations

Photonic Device, Photonics, Waveguides +14

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

Satoshi Suda, Ken Tanizawa, Youichi Sakakibara et al. · Optics Letters · 2012 · 47 citations

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

Ryohei Takei, Shoko Manako, Emiko Omoda et al. · Optics Express · 2014 · 45 citations · Full text

Optical Materials, Engineering, Low Defect A-si +18