On-chip topological transport of optical frequency combs in silicon-based valley photonic crystals

• URL: http://arxiv.org/abs/2310.15629v1
• Date: Tue, 24 Oct 2023 08:53:24 GMT
• Title: On-chip topological transport of optical frequency combs in silicon-based valley photonic crystals
• Authors: Zhen Jiang, Hongwei Wang, Yuechen Yang, Yang Shen, Bo Ji, Yanghe Chen, Yong Zhang, Lu Sun, Zheng Wang, Chun Jiang, Yikai Su, and Guangqiang He
• Abstract summary: We experimentally demonstrate on-chip topological transport for optical frequency combs at telecommunication wavelengths. We access both the quantum frequency combs and dissipative Kerr soliton combs with a micro-resonator. Our topologically protected optical frequency combs could enable the inherent robustness in integrated complex photonic systems.
• Score: 21.64398575116552
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The generation and control of optical frequency combs in integrated photonic systems enables complex, high-controllable, and large-scale devices. In parallel, harnessing topological physics in multipartite systems has allowed them with compelling features such as robustness against fabrication imperfections. Here we experimentally demonstrate on-chip topological transport for optical frequency combs at telecommunication wavelengths, both in classical and nonclassical domains. We access both the quantum frequency combs and dissipative Kerr soliton combs with a micro-resonator. The quantum frequency comb, that is, a coherent superposition of multiple frequency modes, is proven to be a frequency-entangled qudit state. We also show that dissipative Kerr soliton combs are highly coherent and mode-locked due to the collective coherence or self-organization of solitons. Moreover, the valley kink states allow both quantum frequency combs and dissipative Kerr soliton combs with robustness against sharp bends. Our topologically protected optical frequency combs could enable the inherent robustness in integrated complex photonic systems.

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