Affiliation:
1. Taiyuan University of Technology
2. Swinburne University of Technology
Abstract
Here we theoretically design valley photonic crystals (VPCs) based on two-dimensional (2D) hexagonal boron nitride (hBN) materials, which are able to support topological edge states in the visible region. The edge states can achieve spin-dependent unidirectional transmission with a high forward transmittance up to 0.96 and a transmission contrast of 0.99. We further study the effect of refractive index on transmittance and bandwidth, and it is found that with the increase of refractive index, both transmittance and bandwidth increased accordingly. This study opens new possibilities in designing unidirectional transmission devices in the visible region and will find broad applications.
Funder
Young Scientists Fund of the National Natural Science Foundation of China
National Natural Science Foundation of China
Key R&D Program of Shanxi Province
Applied Based Research Program of Shanxi Province
Central Guidance on Local Science and Technology Development Fund of Shanxi Province
Subject
Atomic and Molecular Physics, and Optics
Cited by
12 articles.
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