Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik
Q 15.16: Poster
Montag, 14. März 2011, 16:30–19:30, P1
Finite element modeling of high-Q microcavities — •Dominik Floess1, Tobias Grossmann1,2, Mario Hauser1, Saskia Becker1, Torsten Beck1, Timo Mappes2, and Heinz Kalt1 — 1Institut für Angewandte Physik, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany — 2Institut für Mikrostrukturtechnik, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany
We report on simulations of high-Q microcavities using the JCMresonance-module of the software JCMsuite, which is based on the time-harmonic finite element method. The simulations enable optimization of the device performance by studying geometry variations and allow for understanding of measured mode spectra by visualization of the spatial distribution of whispering gallery modes (WGMs) and their corresponding Q factors.
The eigenfrequencies are computed by solving Maxwell's equations on a finite number of elements using an adaptive refinement technique of the mesh. Due to the radial symmetry of the resonator, the eigenvalue problem is effectively two dimensional. In contrast to many numerical methods carried out in the time domain, this method efficiently allows for the exact analysis of Q factors, eigenfrequencies and field distributions.
First results show the analysis of the modestructure and Q factors of high-Q conical polymeric microcavities, a promising photonic structure for label-free molecule detection. The simulation results predict Q factors above 100 million in the visible sprectral region.