Chiral emission of vortex microlasers enabled by collective modes of guided resonances
Abstract
Vortex lasers have attracted substantial attention in recent years owing to their wide array of applications such as micromanipulation, optical multiplexing, and quantum cryptography. In this work, we propose and demonstrate chiral emission of vortex microlaser leveraging the collective modes from omnidirectionally hybridizing the guided mode resonances (GMRs) within photonic crystal (PhC) slabs. Specifically, we encircle a central uniform PhC with a heterogeneous PhC that features a circular lateral boundary. Consequently, the bulk GMRs hybridize into a series of collective modes due to boundary scatterings, resulting in a vortex pattern in real space with a spiral phase front in its radiation. Benefiting from the long lifetime of GMRs as quasi-bound state in the continuum and using asymmetric pumping to lift the chiral symmetry, we demonstrate stable single-mode lasing oscillation with a low optical pumping threshold of at room temperature. We identify the real-space vortex through polarization-resolved imaging and self-interference patterns, showing a vivid example of applying collective modes to realize compact and energy-efficient vortex microlasers.
Cite
@article{arxiv.2407.16499,
title = {Chiral emission of vortex microlasers enabled by collective modes of guided resonances},
author = {Ye Chen and Mingjin Wang and Jiahao Si and Zixuan Zhang and Xuefan Yin and Jingxuan Chen and NianYuan Lv and Chenyan Tang and Wanhua Zheng and Yuri Kivshar and Chao Peng},
journal= {arXiv preprint arXiv:2407.16499},
year = {2024}
}