Free-space coupling enhancement of micro-resonators via self-accelerating beams
Year: 2018
Type: article
Abstract: We study free-space coupling of optical fields to the whispering-gallery-mode resonators by employing self-accelerating beams orbiting a semicircle. The best coupling condition is obtained through theoretical analysis, in accord with the numerical results. Comparing with the conventional Gaussian-like beams, much enhanced coupling efficiency is achieved with such self-accelerating beams, particularly when a large numerical aperture of an optical system is used or a higher-order azimuthal mode is considered. Conditions with slight deviation from the ideal radius of self-accelerating beams are further discussed, aiming to realize an optimized high coupling efficiency.
Source: Optics Express
DOI: 10.1364/oe.26.032055
Authors: Xu Liu, Yi Hu, Pengbo Jia, Ping Zhang, Hao Wu, Zhenzhong Hao, Fang Bo, Zhigang Chen, Jingjun Xu
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
OpenAlex ID: W2901441922