Topological resonators based on hexagonal-star valley photonic crystals

doi:10.1088/1674-1056/acf44b

中国物理B ›› 2023, Vol. 32 ›› Issue (11): 114208-114208.doi: 10.1088/1674-1056/acf44b

所属专题： SPECIAL TOPIC — Celebrating the 100th Anniversary of Physics Discipline of Northwest University

Topological resonators based on hexagonal-star valley photonic crystals

Xin Wan(万鑫), Chenyang Peng(彭晨阳), Gang Li(李港), Junhao Yang(杨俊豪), and Xinyuan Qi(齐新元)^†

School of Physis, Northwest University, Xi'an 710127, China

收稿日期:2023-06-30 修回日期:2023-08-17 接受日期:2023-08-28 出版日期:2023-10-16 发布日期:2023-11-03
通讯作者: Xinyuan Qi E-mail:qixycn@nwu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 12174307).

Topological resonators based on hexagonal-star valley photonic crystals

Xin Wan(万鑫), Chenyang Peng(彭晨阳), Gang Li(李港), Junhao Yang(杨俊豪), and Xinyuan Qi(齐新元)^†

School of Physis, Northwest University, Xi'an 710127, China

Received:2023-06-30 Revised:2023-08-17 Accepted:2023-08-28 Online:2023-10-16 Published:2023-11-03
Contact: Xinyuan Qi E-mail:qixycn@nwu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 12174307).

摘要/Abstract

摘要： In valley photonic crystals, topological edge states can be gained by breaking the spatial inversion symmetry without breaking time-reversal symmetry or creating pseudo-spin structures, making highly unidirectional light transmission easy to achieve. This paper presents a novel physical model of a hexagonal-star valley photonic crystal. Simulations based on the finite element method (FEM) are performed to investigate the propagation of TM polarized mode and its application to ring resonators. The results show that such a topologically triangular ring resonator exhibits an optimum quality factor Q of about 1.25× 10⁴, and Q has a maximum value for both frequency and the cavity length L. Our findings are expected to have significant implications for developing topological lasers and wavelength division multiplexers.

关键词: valley photonic crystals, triangular resonant cavity, topological edge state, unidirectional transmission

Abstract: In valley photonic crystals, topological edge states can be gained by breaking the spatial inversion symmetry without breaking time-reversal symmetry or creating pseudo-spin structures, making highly unidirectional light transmission easy to achieve. This paper presents a novel physical model of a hexagonal-star valley photonic crystal. Simulations based on the finite element method (FEM) are performed to investigate the propagation of TM polarized mode and its application to ring resonators. The results show that such a topologically triangular ring resonator exhibits an optimum quality factor Q of about 1.25× 10⁴, and Q has a maximum value for both frequency and the cavity length L. Our findings are expected to have significant implications for developing topological lasers and wavelength division multiplexers.

Key words: valley photonic crystals, triangular resonant cavity, topological edge state, unidirectional transmission

中图分类号: (Photonic bandgap materials)

42.70.Qs

03.65.Vf (Phases: geometric; dynamic or topological) 42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)

Xin Wan(万鑫), Chenyang Peng(彭晨阳), Gang Li(李港), Junhao Yang(杨俊豪), and Xinyuan Qi(齐新元). Topological resonators based on hexagonal-star valley photonic crystals[J]. 中国物理B, 2023, 32(11): 114208-114208.

Xin Wan(万鑫), Chenyang Peng(彭晨阳), Gang Li(李港), Junhao Yang(杨俊豪), and Xinyuan Qi(齐新元). Topological resonators based on hexagonal-star valley photonic crystals[J]. Chin. Phys. B, 2023, 32(11): 114208-114208.

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Topological resonators based on hexagonal-star valley photonic crystals

Topological resonators based on hexagonal-star valley photonic crystals

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