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DY: Fachverband Dynamik und Statistische Physik

DY 61: Posters - Quantum Systems

DY 61.7: Poster

Donnerstag, 23. März 2017, 17:00–19:30, P1A

Amended ray-optical description of dielectric optical microcavities — •Pia Stockschläder and Martina Hentschel — Institut für Physik, Technische Universität Ilmenau, Weimarer Straße 25, 98693 Ilmenau, Germany

Dielectric optical microcavities and microlasers have attracted much attention because of their possible applications in photonics or opto-electronics. It has proven useful to describe these systems based on geometrical optics. In this efficient and easily implemented approach, the dielectric cavities can be considered as open billiards. Using the concept of ray-wave correspondence, much insight can be gained about the mode structure and the emission characteristics. Here, we discuss some aspects of an amended ray description of dielectric optical microcavities focusing on the determination of the far-field emission pattern. Firstly, we examine the differences between the modelling of cavities with predominantly chaotic and with non-chaotic classical billiard dynamics (chaotic and non-chaotic cavities, for short). For chaotic cavities, it is well known that the far-field is determined by the overlap of the unstable manifold of the chaotic saddle with the leaky region. For non-chaotic cavities, on the other hand, the trajectories with the smallest, nonzero decay rates dominate the emission pattern. Secondly, we include wave-inspired corrections to the ray-optics which can be important for the reliable description of small cavities. We discuss the influence of these correction terms for systems with curved and with planar boundaries, as well as for systems with chaotic and non-chaotic dynamics.