AI Article Synopsis
- The study focuses on designing valley photonic crystals (VPCs) using two-dimensional hexagonal boron nitride (hBN) to support topological edge states in the visible light spectrum.
- The edge states enable effective spin-dependent unidirectional transmission with impressive performance metrics, including a transmittance of 0.96 and a transmission contrast of 0.99.
- It also examines how increasing the refractive index improves both transmittance and bandwidth, suggesting promising applications for unidirectional transmission devices in the visible range.
Article 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.
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| http://dx.doi.org/10.1364/OE.439769 | DOI Listing |
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