Regensburg 2016 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 41: Quantum Chaos

DY 41.5: Vortrag

Mittwoch, 9. März 2016, 16:15–16:30, H48

Three-dimensional description of optical microcavities — •Jakob Kreismann and Martina Hentschel — TU Ilmenau, Ilmenau, Deutschland

Microcavity lasers made of deformed dielectric disk resonators such as the Limaçon-shaped cavity have attracted a lot of interest because they show directional light emission. Both ray optics and wave simulations for two-dimensional model systems confirm the support of whispering gallery-like modes with high quality factors while possessing directional light emission. In reality, however, these microcavities are three-dimensional objects with finite heights. Therefore we perform numerical simulations of the full three-dimensional system and investigate the influence of the cavity height on the resonance energies, their quality factors and far-field profiles. We discuss analogies of the structure between the two-dimensional and three-dimensional modes, and find a dependence on the ratio of the cavity height to the wavelength that can be quantified in terms of the effective refractive index model. The analysis of the three-dimensional far-field profiles reveals directional emission in azimuthal direction (i.e. in the plane of the resonator) as known from the two-dimensional case, and furthermore directional emission inclined to that plane as a truly three-dimensional effect. We use this new effect for a possible technical application, and design a sensor that can detect particles in the environment based on changes in the emission direction.