近日，哈尔滨工业大学的丁卫强及其研究团队取得一项新进展。经过不懈努力，他们取得一项新进展。经过不懈努力，他们基于滑移反射对称研制出双极化拓扑彩虹集中器。相关研究成果已于2024年7月8日在国际知名学术期刊《物理评论A》上发表。

在本文中，研究人员提出了一种通用且有效的方法，利用滑移反射对称运算来实现TRCs。研究人员从具有完全带隙的普通光子晶体出发，利用镜面反射位置和滑移长度这两个自由度，成功构建了宽带双极化TRCs。非常有趣的是，通过监测两个偏振捕获位置之间的距离，可以精确地推导出入射光的频率。

本文介绍了一种高效、灵活的TRCs配置方法，有望在频谱分析和极化解复用等领域得到广泛应用。

据悉，拓扑彩虹集中器(TRCs)由于能够将不同频率的光子捕获到不同位置，而引起了人们的广泛关注。然而，TRCs的设计并不简单，特别是对于宽带和双极化的TRCs。

附：英文原文

Title: Dual-polarization topological rainbow concentrators based on glide-reflection symmetry

Author: Quanxin Luo, Bojian Shi, Rui Feng, Donghua Tang, Tongtong Zhu, Yongyin Cao, Fangkui Sun, Weiqiang Ding

Issue&Volume: 2024/07/08

Abstract: Topological rainbow concentrators (TRCs) have attracted intense attention due to their capability of capturing photons with varying frequencies to distinct positions. However, the design of TRCs is not straightforward, especially for wideband and dual-polarization ones. In this paper, we propose a general and efficient methodology to realize TRCs by employing the glide-reflection symmetry operation. Starting from an ordinary photonic crystal with complete band gaps, and employing the two degrees of freedom of glide-reflection symmetry, i.e., the position of mirror reflection and the gliding length, wideband and dual-polarization TRCs are constructed successfully. Very interestingly, by monitoring the distance between the trapping positions of the two polarizations, the incident light frequency can be derived precisely. This paper introduces an efficient and flexible approach to configure TRCs, and may contribute to the wide applications in spectral analysis and polarization demultiplexing.

DOI: 10.1103/PhysRevA.110.013503

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.013503