T-shaped topological polarization beam splitter based on a synthetic dimension.

IF 3.1 2区物理与天体物理 Q2 OPTICS

Optics letters Pub Date : 2025-04-01 DOI:10.1364/OL.555633

Ye Li, Zixiang Kong, Yuzhong Zhou, Tian Sang, Guofeng Yang, Haiquan Zhou, Danmei Xu, Yueke Wang

引用次数: 0

Abstract

In this study, we propose a 2D photonic crystal (PC) with a common bandgap (CBG) for both TM and TE polarizations. Based on the Jackiw-Rebbi theory, a pair of topological helical edge states along the domain wall can be found in the parity-inversion bandgap. Pseudospin-locked unidirectional propagation and backscattering immunity of topological edge states (TESs) of dual polarization are demonstrated. By employing translation parameters as a synthetic dimension, the evolution of TESs within a parameter space is investigated. In addition, we design a T-shaped topological polarization beam splitter (TPBS), and finite element method (FEM) simulations show that our TPBS achieves effective separation of dual-polarization TESs. Our work provides an alternate way toward the design of TPBS, providing a new perspective for the development of integrated photonic circuits and optical communication systems.

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基于合成尺寸的t形拓扑偏振分束器。

在这项研究中，我们提出了一种具有 TM 和 TE 偏振共带隙（CBG）的二维光子晶体（PC）。基于 Jackiw-Rebbi 理论，可以在奇偶反转带隙中发现沿畴壁的一对拓扑螺旋边缘态。实验证明了双极化拓扑边缘态（TES）的伪ospin 锁定单向传播和反向散射抗扰性。通过采用平移参数作为合成维度，研究了拓扑边缘态在参数空间内的演化。此外，我们还设计了一种 T 形拓扑极化分束器（TPBS），有限元法（FEM）模拟显示，我们的 TPBS 实现了双极化 TES 的有效分离。我们的工作为 TPBS 的设计提供了另一种途径，为集成光子电路和光通信系统的发展提供了新的视角。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics letters 物理-光学

CiteScore

6.60

自引率

8.30%

发文量

2275

审稿时长

1.7 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.