Abstract

A topologically protected ring-resonator formed in valley photonic crystals is proposed and fabricated on a silicon slab. The unidirectional transmission and robustness against structure defects of its resonant modes are illustrated. Coupled with topological waveguides, the topological ring is functioned as notch and channel-drop filters. The work opens up a new avenue for developing advanced chip-integrated photonic circuits with attributes of topological photonics.

Role of unit-cell defects in terahertz topological ring resonators

Sambhu Jana, Koijam Monika Devi, and Dibakar Roy Chowdhury
J. Opt. Soc. Am. B 39(6) 1590-1597 (2022)

Thermal tunable silicon valley photonic crystal ring resonators at the telecommunication wavelength

Lijuan Kang, Hongming Fei, Han Lin, Min Wu, Xiaorong Wang, Mingda Zhang, Xin Liu, Fei Sun, and Zhihui Chen
Opt. Express 31(2) 2807-2815 (2023)

Terahertz topological photonic waveguide switch for on-chip communication

Xudong Liu, Jialiang Huang, Hao Chen, Zhengfang Qian, Jingwen Ma, Xiankai Sun, Shuting Fan, and Yiwen Sun
Photon. Res. 10(4) 1090-1096 (2022)

Controllable one-way add-drop filter based on magneto-optical photonic crystal with ring resonator and microcavities

Gangchao Tang, Yuhao Huang, Jianfeng Chen, Zhi-Yuan Li, and Wenyao Liang
Opt. Express 30(16) 28762-28773 (2022)

Sum and difference frequency generation in a valley-photonic-crystal-like topological system

Yi Tang, Jia-Lin Li, Chao Li, and Jun-Fang Wu
Opt. Express 32(8) 14594-14606 (2024)