High-speed, low-voltage, low-bit-energy silicon photonic crystal slow-light modulator with impedance-engineered distributed electrodesKeisuke Kawahara, Toshihiko Baba, Yuriko Maegami et al.|Optica|2024Cited by 28
Bandwidth Tripler: Broadband Signal Generation With an Image-Rejection Analog Multiplexer for Fiber Optic TransmittersKeisuke Kawahara, Shinsuke Hara, Joe Sawada et al.|IEEE Transactions on Microwave Theory and Techniques|2022Cited by 8
A 0.0058-mm<sup>2</sup> Inductor-Less CMOS Active Balun With Gain and Phase Errors Within −0.1 ± 0.2 dB and −0.18 ± 1.17<sup>°</sup> From DC to 8 GHzKeisuke Kawahara, Shinsuke Hara, Kyoya Takano et al.|IEEE Transactions on Circuits and Systems I Regular Papers|2023Cited by 4