Dresden 2020 – wissenschaftliches Programm
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DY 39.2: Vortrag
Mittwoch, 18. März 2020, 15:30–15:45, HÜL 186
Corrected perturbation theory for transverse-electric whispering-gallery modes in deformed microdisks — •Manuel Badel and Jan Wiersig — Postfach 4120, D-39016 Magdeburg, Germany
The perturbation theory by Ge et al. [Phys. Rev. A 87, 023833 (2013)] 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. 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 one to describe the counterintuitive phenomenon of Q-factor enhancement due to weak boundary deformation, examplified by the microflower cavity. Good agreement of the corrected perturbation theory with full numerical results is observed.