Topological Photonic Crystal in Microwave Region Based on Coupled Superconducting Resonators

Author:

Zheng Tianning12ORCID,Chang Xiaoyang2ORCID,Huang Juntian2ORCID,Liu Yilun3,Wei Jiaqi2ORCID,Guo Qi2

Affiliation:

1. National Key Lab of Spintronics, Institute of International Innovation, Beihang University, Hangzhou 311115, China

2. School of Integrated Circuit Science and Engineering, Beihang University, Beijing 100191, China

3. School of Electrical, Electronic, and Mechanical Engineering, University of Bristol, Queens Road, Bristol BS8 1QU, UK

Abstract

Topological photonics has been widely investigated due to its profound physical significance and great number of potential applications. Microwaves have long wavelengths, so it is relatively easy to manufacture large-sized microwave photonic crystals, enabling researchers to observe and measure phenomena such as topological boundary states. Nevertheless, the quality factors (QFs) of most resonators composed of traditional materials in the microwave region are relatively low, leading to topological edge states with high decay rates. In this study, we present a one-dimensional topological photonic crystal in the microwave region based on coupled superconducting resonators. A topological state with a QF as high as 6000 is observed, which proves this to be a new platform for the investigation of topological photonics with low decay rates in the microwave regime.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

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