Monolithic integration of silicon-, germanium-, and silica-based optical devices for telecommunications applications T Tsuchizawa, K Yamada, T Watanabe, S Park, H Nishi, R Kou, ... IEEE Journal of Selected Topics in Quantum Electronics 17 (3), 516-525, 2010 | 136 | 2010 |
Quantum-critical conductivity of the Dirac fluid in graphene P Gallagher, CS Yang, T Lyu, F Tian, R Kou, H Zhang, K Watanabe, ... Science 364 (6436), 158-162, 2019 | 131 | 2019 |
A dielectric-defined lateral heterojunction in a monolayer semiconductor MIB Utama, H Kleemann, W Zhao, CS Ong, FH da Jornada, DY Qiu, H Cai, ... Nature Electronics 2 (2), 60-65, 2019 | 117 | 2019 |
High-performance silicon photonics technology for telecommunications applications K Yamada, T Tsuchizawa, H Nishi, R Kou, T Hiraki, K Takeda, H Fukuda, ... Science and Technology of Advanced Materials 15 (2), 024603, 2014 | 93 | 2014 |
Monolithic integration of a silica AWG and Ge photodiodes on Si photonic platform for one-chip WDM receiver H Nishi, T Tsuchizawa, R Kou, H Shinojima, T Yamada, H Kimura, ... Optics Express 20 (8), 9312-9321, 2012 | 83 | 2012 |
Optical nonlinearity enhancement with graphene-decorated silicon waveguides A Ishizawa, R Kou, T Goto, T Tsuchizawa, N Matsuda, K Hitachi, ... Scientific reports 7 (1), 45520, 2017 | 74 | 2017 |
Monolithic integration of a silica-based arrayed waveguide grating filter and silicon variable optical attenuators based on p–i–n carrier-injection structure H Nishi, T Tsuchizawa, T Watanabe, H Shinojima, S Park, R Kou, ... Applied Physics Express 3 (10), 102203, 2010 | 62 | 2010 |
High-gain, wide-dynamic-range parametric interaction in Mg-doped LiNbO3 quasi-phase-matched adhered ridge waveguide R Kou, S Kurimura, K Kikuchi, A Terasaki, H Nakajima, K Kondou, ... Optics Express 19 (12), 11867-11872, 2011 | 58 | 2011 |
Si-Ge-Silica Monolithic Integration Platform and Its Application to a 22-Gb/s 16-ch WDM Receiver T Hiraki, H Nishi, T Tsuchizawa, R Kou, H Fukuda, K Takeda, Y Ishikawa, ... IEEE Photonics Journal 5 (4), 4500407-4500407, 2013 | 48 | 2013 |
Characterization of optical absorption and polarization dependence of single-layer graphene integrated on a silicon wire waveguide R Kou, S Tanabe, T Tsuchizawa, K Warabi, S Suzuki, H Hibino, ... Japanese Journal of Applied Physics 52 (6R), 060203, 2013 | 46 | 2013 |
Mid-IR broadband supercontinuum generation from a suspended silicon waveguide R Kou, T Hatakeyama, J Horng, JH Kang, Y Wang, X Zhang, F Wang Optics Letters 43 (6), 1387-1390, 2018 | 43 | 2018 |
Influence of carrier lifetime on performance of silicon pin variable optical attenuators fabricated on submicrometer rib waveguides S Park, K Yamada, T Tsuchizawa, T Watanabe, H Shinojima, H Nishi, ... Optics express 18 (11), 11282-11291, 2010 | 41 | 2010 |
Influence of graphene on quality factor variation in a silicon ring resonator R Kou, S Tanabe, T Tsuchizawa, T Yamamoto, H Hibino, H Nakajima, ... Applied Physics Letters 104 (9), 2014 | 28 | 2014 |
Contributions of Franz–Keldysh and Avalanche Effects to Responsivity of a Germanium Waveguide Photodiode in the -Band K Takeda, T Hiraki, T Tsuchizawa, H Nishi, R Kou, H Fukuda, ... IEEE Journal of Selected Topics in Quantum Electronics 20 (4), 64-70, 2013 | 23 | 2013 |
Evaluation of graphene optical nonlinearity with photon-pair generation in graphene-on-silicon waveguides Y Yonezu, R Kou, H Nishi, T Tsuchizawa, K Yamada, T Aoki, A Ishizawa, ... Optics Express 27 (21), 30262-30271, 2019 | 16 | 2019 |
Octave-spanning supercontinuum generation at telecommunications wavelengths in a precisely dispersion-and length-controlled silicon-wire waveguide with a double taper structure A Ishizawa, T Goto, R Kou, T Tsuchizawa, N Matsuda, K Hitachi, ... Applied Physics Letters 111 (2), 2017 | 16 | 2017 |
Low-polarization-dependent silica waveguide monolithically integrated on SOI photonic platform H Nishi, T Tsuchizawa, H Shinojima, T Watanabe, SI Itabashi, R Kou, ... Journal of lightwave technology 31 (11), 1821-1827, 2013 | 16 | 2013 |
Single silicon wire waveguide based delay line interferometer for DPSK demodulation R Kou, H Nishi, T Tsuchizawa, H Fukuda, H Shinojima, K Yamada Optics Express 20 (10), 11037-11045, 2012 | 15 | 2012 |
Inter-layer light transition in hybrid III-V/Si waveguides integrated by µ-transfer printing R Kou, T Hiratani, H Yagi, H Kuwatsuka, TH Yen, M Okano, M Ohno, ... Optics Express 28 (13), 19772-19782, 2020 | 13 | 2020 |
Ultra-fine metal gate operated graphene optical intensity modulator R Kou, Y Hori, T Tsuchizawa, K Warabi, Y Kobayashi, Y Harada, H Hibino, ... Applied Physics Letters 109 (25), 2016 | 12 | 2016 |