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Corrected perturbation theory for transverse-electric whispering-gallery modes in deformed microdisks

Authors :
Badel, Manuel
Wiersig, Jan
Source :
Phys. Rev. A 99, 063825 (2019)
Publication Year :
2018

Abstract

The perturbation theory by L. Ge et al. [Phys. Rev. A 87, 023833] for transverse-electric polarized modes in weakly deformed microdisks omits terms related to the variation of the normal derivative of the magnetic field along the boundary. Here we show that these terms are necessary to accurately describe microdisks with a strongly winding boundary. In particular, it is demonstrated that the corrected perturbation theory allows to describe the counterintuitive phenomenon of Q-factor enhancement due to weak boundary deformation. We discuss in detail the microflower cavity and the limacon cavity. Good agreement of the corrected perturbation theory with full numerical results is observed.<br />Comment: 13 pages, 9 figures

Subjects

Subjects :
Physics - Optics

Details

Database :
arXiv
Journal :
Phys. Rev. A 99, 063825 (2019)
Publication Type :
Report
Accession number :
edsarx.1811.11631
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevA.99.063825