Seminar: Nonlinear Photonics in High-Q Microcavities: From All-Optical Switches to Microresonator Frequency Combs

Title: Nonlinear Photonics in High-Q Microcavities: From All-Optical Switches to Microresonator Frequency Combs

Speaker: Dr Takasumi Tanabe, Professor, Electronics and Electrical Engineering, Keio University, Japan

Abstract:
High-Q micro and nanocavities, such as photonic crystal nanocavities and high-Q whispering gallery mode (WGM) microcavities, are attractive for applications that require strong interaction between light and matter, as the electric field density scales with Q/V, where V is the mode volume of the cavity. I will introduce all-optical switches in photonic crystals and high-Q WGM resonators, mode-locking in coupled microresonators, and optical frequency combs in microresonators.
[1]  K. Nozaki, TT, et al. Nat. Photon. 4, 477-483 (2010).
[2] S. Fujii, et al. TT, "All-precision-machining fabrication of ultrahigh-Q crystalline optical microresonators,” Optica 7, 694 (2020).
[3] S. Fujii, et al. TT, "Mechanically actuated Kerr soliton microcombs," Laser Photon. Rev. 2024, 2301329 (2024).
[4] R. Imamura, et al. TT, "Exceptional point proximity-driven mode-locking in coupled microresonators," Opt. Express 32, 22280 (2024).

Bio:
Takasumi Tanabe received his B.S. in Electronics and Electrical Engineering from Keio University, Yokohama, Japan, in March 2000, and his M.S. and Ph.D. in Design Engineering from the same institution in September 2001 and March 2004, respectively. In April 2004, he joined NTT Basic Research Laboratories, NTT Corporation, in Atsugi, Japan. In April 2010, he moved to the Department of Electronics and Electrical Engineering at Keio University, where he is currently a professor. He received the Scientific American 50 Award in 2007. Dr. Tanabe is a member of the Optical Society, IEEE Photonics Society, and SPIE. He is currently an Associate Editor for AIP Advances (APS) and Scientific Reports (NPG) and also served as Senior Editor for the IEEE Journal of Selected Topics in Quantum Electronics.

Sponsored by the OPTICA/SPIE student chapter