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We aim to develop high-performance optical devices by using heterogeneous integration of various materials on photonic integrated circuits.

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The Young Scientists' Award, The Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology, 2026
Maejima Hisoka Encouragement Award, Tsushinbunka Association, 2025
Young Scientist Presentation Award, The Japan Society of Applied Physics, 2010
Hatakeyama Award, The Japan Society of Mechanical Engineer, 2009

Subcommittee Members, Optical Fiber Communication Conference (Active Optoelectronic Components ), 2026
Technical Program Committee, 31st OptoElectronics and Communications Conference (OECC 2026), 2026
Committee Member, Photonics Division, The Japan Society of Applied Physics (JSAP), 2025-2026
Program Sub-committee Members, The 16th Pacific Rim Conference on Lasers and Electro-Optics, 2024
Topic Committee Members, IEEE Photonics Conference (Materials, Foundries and Fabrication), 2023-2026
Editor, Journal of the Institute of Electronics, Information and Communication Engineers (IEICE), 2022-2024
Program Sub-committee Members, The 15th Pacific Rim Conference on Lasers and Electro-Optics, 2022
Topic Committee Members, IEEE Photonics Conference, 2020

T. Hiraki et al., "Integrated Optical Link on Si Wafer Using Low Energy Membrane InP-Based Photonic Devices," Journal of Lightwave Technology, vol. 44, pp. 1005-1011 (2026).
T. Hiraki et al., "Over-67-GHz-Bandwidth Membrane InGaAlAs Electro-Absorption Modulator Integrated With DFB Laser on Si Platform," Journal of Lightwave Technology, vol. 41, pp. 880-887 (2023).
T. Hiraki et al., "50-GHz-Bandwidth Membrane InGaAsP Electro-Absorption Modulator on Si Platform," Journal of Lightwave Technology, vol. 39, pp. 5300-5306 (2021).
T. Hiraki et al., "Integration of a high-efficiency Mach-Zehnder modulator with a DFB laser using membrane InP-based devices on a Si photonics platform," Optics Express, vol. 29, pp. 2431-2441 (2021).
T. Hiraki et al., "Membrane InGaAsP Mach-Zehnder Modulator Integrated With Optical Amplifier on Si Platform," Journal of Lightwave Technology, vol. 38, pp. 3030-3036 (2020).
T. Hiraki et al., "Deuterated SiN/SiON Waveguides on Si Platform and Their Application to C-Band WDM Filters," IEEE Photonics Journal, vol. 9, Art no. 2500207 (2017).
T. Hiraki et al., "Heterogeneously integrated III-V/Si MOS capacitor Mach-Zehnder modulator," Nature Photonics, 11, pp. 482-485 (2017).
T. Hiraki et al., "Si-Ge-Silica Monolithic Integration Platform and Its Application to a 22-Gb/s × 16-ch WDM Receiver,"IEEE Photonics Journal, vol. 5, Art no. 4500407 (2013).

Fellows/Senior Distinguished Researchers/Distinguished Researchers