Open AccessEffects of the magnetodipole corrections on the spectra of spheroidal whispering gallery mode resonators interacting with a dielectric nanoparticle
Author(s) -
Lev Deych,
Lan Yang
Publication year - 2020
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.385993
Subject(s) - whispering gallery wave , resonator , nanoparticle , dielectric , optics , field (mathematics) , physics , q factor , whispering gallery , materials science , optoelectronics , condensed matter physics , quantum mechanics , mathematics , pure mathematics
Interaction between whispering gallery mode (WGM) resonators and nanoparticles is an area of active interest in fundamental understanding of nanoparticle-induced spectral modifications of the WGM resonances in sensing applications. Existing theories of this phenomenon assume that nanoparticles can be described taking into account only the electrodipole contribution to the field of the nanoparticle. In this paper, we explore theoretically the effects of the magnetodipole contribution to the nanoparticle's field and show that this contribution might become significant even in situations when electrodipole approximation is expected to remain valid.