Open AccessStrong couplings between magnetic quantum emitters and subwavelength all-dielectric resonators with whispering gallery modes
Author(s) -
Ma-Long Hu,
Zhong-Jian Yang,
Xiaojing Du,
Lin Ma,
Jun He
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.434586
Subject(s) - whispering gallery wave , resonator , physics , optics , dielectric , purcell effect , whispering gallery , cavity quantum electrodynamics , magnetic field , refractive index , dipole , dielectric resonator , optoelectronics , spontaneous emission , quantum , laser , quantum mechanics , open quantum system
Here we theoretically investigate the coherent interactions between the quantum emitters with magnetic dipole transitions and subwavelength all-dielectric resonators of whispering gallery modes (WGMs). We extend a semi-analytical method which can efficiently calculate the far-field spectrum of a general hybrid system. Then, a subwavelength sphere with refractive index around n = 3.5 is chosen as the dielectric resonator. Due to the high magnetic field enhancements of the WGMs of the sphere, strong couplings between magnetic quantum emitters and subwavelength WGMs can occur, where a clear Rabi splitting appears on the extinction spectrum of the hybrid system. The match between the relaxation times of the WGMs and emitters are important to efficiently achieve a strong enough coupling. The other parameters including the order of a WGM, the radius, the refractive index, the transition dipole moment and excitation intensity are also important factors that can affect the couplings. Our results pave the way for strong interactions between light and magnetic emitters mediated by subwavelength all-dielectric resonators.