Author(s): Shen, ZZ (Shen, Zheng-zheng); Tang, M (Tang, Min); Chen, YL (Chen, You-Ling); Huang, YZ (Huang, Yong-Zhen)

Source: OPTICS EXPRESS Volume: 29 Issue: 2 Pages: 1666-1677 DOI: 10.1364/OE.412974 Published: JAN 18 2021

Abstract: We propose a novel deformed square resonator which has four asymmetric circular sides. Photons leak out from specific points, depending on the interplay between stable islands and unstable manifolds in phase space. By carefully breaking the mirror reflection symmetry, optical modes with strong chirality approaching 1 and unidirectional emission can be achieved simultaneously. Upon binding of a nanoparticle, the far-field emission pattern of the deformed microcavity changes drastically. Due to the EP point of the degenerate mode pairs in the deformed cavity, chirality-based far-field detection of nanoparticles with ultra-small size can be realized. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Accession Number: WOS:000609227300096

ISSN: 1094-4087

Full Text: https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-29-2-1666&id=446470