Sven Burger, Stephan Reitzenstein
01.04.2022 − 31.03.2025
The project aims at developing and employing numerical methods for simulation and optimization of coupled emitter – cavity systems, and to use these methods for designing systems of QDs coupled to integrated, high-Q microcavities for state engineering. Further we aim at coupling efficiency enhancement for integrated, waveguide-coupled setups. A main goal is the investigation and development of contour integration based methods for eigenvalue solvers and for eigenmode expansion, and their application to topical devices for photonic quantum technology. A schematics of a contour integration based modal expansion is depicted in Fig. 1.
Research results of this project include the numerical optimization of fiber-coupled single-photon sources , a new method to compute eigenvalue sensitivities , a method for resonance expansions of quadratic quantities , and a method for the computation of poles and zeros and their sensitivities . Further research results of this project include applications of the developed methods to systems of emitters and plasmonic and nanooptical resonators [5,6,7,8,9,10,11].
Further, research data and software have been made available via open access data publications [12,13,14,15,16,17,18].
Fig. 1. Schematics: Contour integrations in the complex eigenvalue plane. The contours (dashed lines) encircling resonance frequencies (red crosses) allow to determine the corresponding modal fields, the outer contour (solid line) allows for evaluating the background contribution to the modal expansion of the field caused by the emitter at a real frequency.