Fellows
/Senior Distinguished
Researchers
/Distinguished
Researchers

Awards

• IEICE Best Paper Award 2011,"Compact and Athermal DQPSK Demodulator with Silica-Based Planar Lightwave Circuit"
• IEICE Electronics society activity testimonial award 2014
• IEICE Electronics society activity testimonial award 2018

Academic Activities

• IEICE Optoelectronics Technical Committee Secretary (2012-2013)
• IEICE Electronics Society Director, Planning and Membership (2014-2015)
• IEICE Electronics Society Director, General Affairs (2016-2017)
• IEICE Optoelectronics Technical Committee Vice-Chair (2021)

Visiting Professor

• Part-time lecturer, Yokohama National University

Papers

Recent journal papers

• Nakajima, Mitsumasa; Tanaka, Kenji; Hashimoto, Toshikazu, "Scalable reservoir computing on coherent linear photonic processor," Communications Physics Vol. 4, No.1 (2021)
• Sparrow, Chris; Martín-López, Enrique; Maraviglia, Nicola; Neville, Alex; Harrold, Christopher; Carolan, Jacques; Joglekar, Yogesh N; Hashimoto, Toshikazu; Matsuda, Nobuyuki; O'Brien, Jeremy L; "Simulating the vibrational quantum dynamics of molecules using photonics," Nature (2018)
• Miyata, Masashi; Nakajima, Mitsumasa; Hashimoto, Toshikazu; "High-sensitivity color imaging using pixel-scale color splitters based on dielectric metasurfaces," ACS Photonics (2019)
• Akatsuka, Tomoya; Goh, Takashi; Imai, Hiromitsu; Oguri, Katsuya; Ishizawa, Atsushi; Ushijima, Ichiro; Ohmae, Noriaki; Takamoto, Masao; Katori, Hidetoshi; Hashimoto, Toshikazu; "Optical frequency distribution using laser repeater stations with planar lightwave circuits," Optics Exp. (2020)
• Miyata, Masashi; Nakajima, Mitsumasa; Hashimoto, Toshikazu; "Compound-eye metasurface optics enabling a high-sensitivity, ultra-thin polarization camera," Optics Exp. (2020)
• Yamazaki, Hiroshi; Nakamura, Masanori; Kobayashi, Takayuki; Nagatani, Munehiko; Wakita, Hitoshi; Ogiso, Yoshihiro; Nosaka, Hideyuki; Hashimoto, Toshikazu; Miyamoto, Yutaka; "Net-400-Gbps PS-PAM transmission using integrated AMUX-MZM," Optics Exp. (2019)
• Yamazaki, Hiroshi; Nagatani, Munehiko; Hamaoka, Fukutaro; Horikoshi, Kengo; Nakamura, Masanori; Matsushita, Asuka; Kanazawa, Shigeru; Hashimoto, Toshikazu; Nosaka, Hideyuki; Miyamoto, Yutaka; "Ultra-high-speed optical transmission using digital-preprocessed analog-multiplexed DAC," Optics Communications (2018)
• Yamazaki, Hiroshi; Nakamura, Masanori; Goh, Takashi; Hashimoto, Toshikazu; Miyamoto, Yutaka; "Extension of Transmitter Bandwidth Using Optical Time-Interleaving Modulator and Digital Spectral Weaver," JLT (2020)
• Yamazaki, Hiroshi; Nagatani, Munehiko; Wakita, Hitoshi; Ogiso, Yoshihiro; Nakamura, Masanori; Ida, Minoru; Nosaka, Hideyuki; Hashimoto, Toshikazu; Miyamoto, Yutaka; "IMDD transmission at net data rate of 333 Gb/s using over-100-GHz-bandwidth analog multiplexer and Mach-Zehnder modulator," JLT (2019)
• Yamazaki, Masashi; Seno, Kazunori; Hashimoto, Toshikazu; Uenohara, Hiroyuki; "Experimental Investigation of Wavelength Conversion Using Highly-Nonlinear Fiber and Two-Stage-Comb-Generated Pump With High Frequency Precision," JLT (2019)
• Nakajima, Mitsumasa; Suzuki, Kenya; Seno, Kazunori; Kasahara, Ryoichi; Goh, Takashi; Miyamoto, Yutaka; Hashimoto, Toshikazu; "Optical Arbitrary Waveform Processing of Over 100 Spatial Channels for Optical Performance Monitoring," JLT (2018)
• Yamazaki, Hiroshi; Nagatani, Munehiko; Hamaoka, Fukutaro; Kanazawa, Shigeru; Nosaka, Hideyuki; Hashimoto, Toshikazu; Miyamoto, Yutaka; "Discrete Multitone Transmission at Net Data Rate of 250 Gb/s Using Digital-Preprocessed Analog-Multiplexed DAC With Halved Clock Frequency and Suppressed Image," JLT (2017)
• Nakajima, Mitsumasa; Suzuki, Kenya; Yamaguchi, Keita; Ono, Hirotaka; Goh, Takashi; Fukutoku, Mitsunori; Miyamoto, Yutaka; Hashimoto, Toshikazu; "Multilane photonic spectral processor integrated in a spatial and planar optical circuit for a space-division multiplexing network," JLT (2017)
• Yamazaki, Hiroshi; Nagatani, Munehiko; Wakita, Hitoshi; Nakamura, Masanori; Kanazawa, Shigeru; Ida, Minoru; Hashimoto, Toshikazu; Nosaka, Hideyuki; Miyamoto, Yutaka; "160-GBd (320-Gb/s) PAM4 transmission using 97-GHz bandwidth analog multiplexer," PTL (2018)
• Sakamoto, Junji; Goh, Takashi; Katayose, Satomi; Kasahara, Ryoichi; Hashimoto, Toshikazu; "Shape-optimized multi-mode interference for a wideband visible light coupler," Optics Communications (2019)
• Sakamoto, Junji; Nakamura, Atsushi; Okamoto, Keiji; Hashimoto, Toshikazu; "Low-mode-crosstalk coupler using multistage mode conversion," Optics Communications (2019)
• Sakamoto, Junji; Goh, Takashi; Katayose, Satomi; Watanabe, Kei; Itoh, Mikitaka; Hashimoto, Toshikazu; "Compact and low-loss RGB coupler using mode-conversion waveguides," Optics Communications (2018)
• Sakamoto, Junji; Hashimoto, Toshikazu; Kawata, Hiroaki; Hirai, Yoshihiko; "Single-Mode Polymer Embedded Waveguide for Visible Wavelength using SU-8," JPST (2019)
• Nakajima, Mitsumasa; Nemoto, Naru; Yamaguchi, Keita; Kudo, Hiroshi; Yamaguchi, Joji; Suzuki, Kenya; Hashimoto, Toshikazu; "Analysis and suppression of high-order diffractions in liquid-crystal-based spatial light modulator for photonic switch application," JJAP (2017)
• Miyata, Masashi; Nakajima, Mitsumasa; Hashimoto, Toshikazu; "Impedance-matched dielectric metasurfaces for non-discrete wavefront engineering," JAP (2019)

Recent conference papers

• Yamazaki, Hiroshi; Nakamura, Masanori; Goh, Takashi; Hashimoto, Toshikazu; Miyamoto, Yutaka; "Transmitter Bandwidth Extension Using Optical Time-Interleaving Modulator and Digital Spectral Weaver," OFC (2020)
• Fujisawa, Takeshi; Sakamoto, Taiji; Miyata, Masashi; Matsui, Takashi; Hashimoto, Toshikazu; Kasahara, Ryoichi; Nakajima, Kazuhide; Saitoh, Kunimasa; "Wavefront-matching-method-designed six-mode-exchanger based on grating-like waveguide on silica-PLC platform," OFC (2020)
• Hashimoto, Toshikazu; "Automated Optical Waveguide Design Based on Wavefront Matching Method," OFC (2020)
• Ibrahim, Salah; Hashimoto, Toshikazu; "Novel Lambda-Rich Data Center Network: From Underlying Principles to Candidate Technologies," OFC (2019)
• Yamaguchi, Keita; Seno, Kazunori; Suzuki, Kenya; Kawahara, Hiroki; Fukutoku, Mitsunori; Hashimoto, Toshikazu; Miyamoto, Yutaka; "Integrated wavelength selective switch array for space division multiplexed network with ultra-low inter-spatial channel crosstalk," OFC (2018)
• Nakajima, Mitsumasa; Suzuki, Kenya; Seno, Kazunori; Goh, Takashi; Kasahara, Ryoichi; Fukutoku, Mitsunori; Miyamoto, Yutaka; Hashimoto, Toshikazu; "Over-100-spatial-channel programmable spectral processor for SDM signal monitoring," OFC (2018)
• Nakajima, Mitsumasa; Suzuki, Kenya; Yamaguchi, Keita; Ono, Hirotaka; Kawahara, Hiroki; Fukutoku, Mitsunori; Mizuno, Takayuki; Miyamoto, Yutaka; Hashimoto, Toshikazu; "SDM-compatible dynamic gain equalizer using spatial and planar optical circuit," OFC (2017)
• Konisho, Shiori; Nakajima, Mitsumasa; Miyata, Masashi; Katayose, Satomi; Seno, Kazunori; Hashimoto, Toshikazu; "A compact WSS integrated by 1-f SPOC with dispersive metasurface and spectral interleaver," ECOC (2019)
• Muranaka, Yusuke; Nakahara, Tatsushi; Ibrahim, Salah; Fujii, Takuro; Sakamaki, Yohei; Hashimoto, Toshikazu; "A route-and-select optical switch with flip-chip-bonded LVDS-compatible driver for sub-nanosecond switching," ECOC (2019)
• Ibrahim, Salah; Hashimoto, Toshikazu; Shigematsu, Satoshi; "Contention-less scheduling-free Torus optical network comprising thousands of nodes," ECOC (2018)
• Seno, Kazunori; Yamaguchi, Keita; Suzuki, Kenya; Hashimoto, Toshikazu; "Wide-Passband C+L-Band Wavelength Selective Switch by Alternating Wave-Band Arrangement on LCOS," ECOC (2018)
• Yamazaki, Hiroshi; Nagatani, Munehiko; Wakita, Hitoshi; Ogiso, Yoshihiro; Nakamura, Masanori; Ida, Minoru; Hashimoto, Toshikazu; Nosaka, Hideyuki; Miyamoto, Yutaka; "Transmission of 400-Gbps discrete multi-tone signal using> 100-GHz-bandwidth analog multiplexer and InP Mach-Zehnder modulator," ECOC (2018)
• Yamazaki, Hiroshi; Nagatani, Munehiko; Hamaoka, Fukutaro; Kanazawa, Shigeru; Nosaka, Hideyuki; Hashimoto, Toshikazu; Miyamoto, Yutaka; "Ultra-Wideband Digital-to-Analog Conversion Technologies for Tbit/s channel transmission," ECOC (2017)
• Muranaka, Y; Nakahara, T; Ibrahim, S; Fujii, T; Segawa, T; Hashimoto, T; Takahashi, R; "Monolithically integrated 4× 4 optical switch with cascaded MZIs and EAM-gate array," ECOC (2017)
• Miyata, Masashi; Nakajima, Mitsumasa; Hashimoto, Toshikazu; "Continuous Gradient Dielectric Metasurfaces for Non-discrete Spatial Light Manipulation," CLEO (2018)
• Nakajima, Mitsumasa; Inubushi, Masanobu; Goh, Takashi; Hashimoto, Toshikazu; "Coherently Driven Ultrafast Complex-Valued Photonic Reservoir Computing," CLEO (2018)
• Sparrow, Chris; Paesani, Stefano; Maraviglia, Nicola; Santagati, Raffaele; Vigliar, Caterina; Neville, Alex; Harrold, Chris; Russell, Nicholas J; O'Brien, Jeremy; Tew, David; "Quantum simulations in integrated photonics," Quantum Information and Measurement (2019)
• Ishikawa, Hiroshi; Ibrahim, Salah; Nakahara, Tatsushi; Sugiyama, Hiroki; Hashimoto, Toshikazu; "A Novel Optoelectronic Parallel-to-Serial Converter for 100-Gbps Optical Packets," PSC (2018)
• Ibrahim, Salah; Nakahara, Tatsushi; Ishikawa, Hiroshi; Hashimoto, Toshikazu; Takahashi, Ryo; "Highly energy-efficient receiver module for 100-Gbps burst-mode optical packets," PS (2017)
• Yamazaki, Hiroshi; Nagatani, Munehiko; Kanazawa, S; Nakamura, M; Hamaoka, F; Nosaka, Hideyuki; Hashimoto, Toshikazu; Miyamoto, Yutaka; "Digital-Preprocessed Analog-Multiplexed DAC Technology for High-Speed Optical Transmission," PS (2017)
• Yamazaki, Hiroshi; Nakamura, Masanori; Goh, Takakashi; Hashimoto, Toshikazu; Miyamoto, Yutaka; "Optical-Domain Extension of Transmitter Bandwidth Using Time-Interleaving Modulator," OECC (2020)
• Serio, Kazunori; Isoda, Akira; Mizuno, Takayuki; Yamaguchi, Keita; Suzuki, Kenya; Hashimoto, Toshikazu; Miyamoto, Yutaka; "6× 6 Wavelength Cross Connect with 2-f and 4-f Optical Systems for SDM Photonic Nodes," OECC (2019)
• Ibrahim, Salah; Nakahara, Tatsushi; Muranaka, Yusuke; Hashimoto, Toshikazu; "Burst-Mode Optical-Clock-Pulse Generator with Enhanced Sensitivity," OECC (2019)
• Yamazaki, Hiroshi; Nagatani, Munehiko; Wakita, Hitoshi; Nakamura, Masanori; Hamaoka, Fukutaro; Kobayashi, Takayuki; Ogiso, Yoshihiro; Ida, Minoru; Hashimoto, Toshikazu; Nosaka, Hideyuki; "Digital-Preprocessed Analog-Multiplexed DAC for High-Speed Optical Communications," OECC (2019)
• Yamazaki, Masashi; Seno, Kazunori; Hashimoto, Toshikazu; Uenohara, Hiroyuki; "Investigation of all-optical wavelength conversion with 2-stage-comb-generated pump for high frequency resolution," OECC (2019)
• Kawahara, Hiroki; Sahara, Akio; Sone, Yoshiaki; Kawai, Shingo; Fukutoki, Mitsunori; Miyamoto, Yutaka; Yamaguchi, Keita; Suzuki, Kenya; Hashimoto, Toshikazu; "First investigation and reduction of inter-WSS crosstalk in multiple-arrayed WSSs for large-scale optical node," OECC (2017)

Keywords

• Optical circuits, Lightwave circuits, Optical information processing, Optical quantum information processing, Optical quantum computer