Weakly deformed optical microdisks: A third-order perturbation theory for transverse-magnetic modes. (13th November 2020)

• Record Type: Journal Article
• Authors: Kullig, Julius; Wiersig, Jan
• Is Part Of: Journal of physics communications. Volume 4:Number 10(2020)
• Publication Date: 2020-11-13
• Subjects: microcavities -- optical cavities -- weakly deformed mcirodisks -- perturbation theory -- open systems; Physics -- Periodicals; 530.05
• DOI: 10.1088/2399-6528/abc764
• Languages: English
• ISSNs: 2399-6528

Abstract

Abstract: In the past years weakly deformed optical microdisks have become a focus for fundamental and applied research with lots of interesting new findings. A commonly used method to study such cavities is a perturbation theory based on weak boundary deformations (Dubertrand et al 2008 Phys. Rev. A 77, 013 804). In this paper we extent the perturbation theory to the third order which allows us to improve its accuracy significantly. We discuss various example systems in regard of Q -spoiling, frequency splitting, and far-field emission pattern. The results from the perturbation theory are in a very good agreement to full numerical simulations.