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arXiv · 2203.07602

On-chip ultra-compact hexagonal boron nitride topological ring-resonator in visible region

Min Wu·Yibiao Yang·Hongming Fei·Han Lin·Xiaodan Zhao·Lijuan Kang
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Abstract

Ultra-compact topological ring-resonators with chirality are important devices for quantum optics. However, there are limited demonstrations of chiral resonators, especially in the visible region. We proposed a topological photonic ring-resonator based on hexagonal boron nitride (hBN) valley photonic crystal (VPC). The spin-valley locking effect in VPC allows achieving robust unidirectional transmission of edge states in the visible region (600 nm-650 nm). As a result, a high quality factor (679.3) with a free spectral range of 15.2 nm in the visible region can be achieved in a hBN all-pass filter with a compact size. In addition, we investigated the transmission properties of hBN ring-resonators with different shapes and combinations, confirming the flexibility of designing topological ring-resonators based on this principle. This design can be readily integrated with quantum photonic chips for broad applications.

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Min Wu, Yibiao Yang, Hongming Fei, Han Lin, Xiaodan Zhao, Lijuan Kang. 2022-03-15. On-chip ultra-compact hexagonal boron nitride topological ring-resonator in visible region. https://doi.org/10.1109/jlt.2022.3203563

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