Dresden 2014 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 23: Quantum Chaos

DY 23.6: Vortrag

Mittwoch, 2. April 2014, 16:15–16:30, ZEU 146

Manifestation of periodic orbits in triangular microlasers — •Stefan Bittner¹, Clément Lafargue¹, Christian Ulysse², Alain Grigis³, Joseph Zyss¹, and Mélanie Lebental¹ — ¹Quantum and Molecular Photonics Laboratory, ENS Cachan — ²Laboratory for Photonics and Nanostructures, Marcoussis — ³Laboratoire Analyse, Géométrie et Applications, University Paris 13

One of the main interests in open dielectric resonators is to understand the correspondence between their wave dynamics and the classical ray dynamics. We present experiments with flat organic microlasers of triangular shape. The aim of the experiments was to understand the relation between the lasing properties of the microlasers and the periodic orbits (POs) in the corresponding triangular billiards. Triangles are of special interest since they are the most simple polygons and because the number and types of POs in general triangular billiards remain unknown. The spectra and far-field distributions of the microlasers were measured and photographs of the lasing cavities themselves were taken. These data allowed to identify the underlying POs. Several types of triangles with different kinds of classical dynamics and POs were studied. In some cases all lasing modes were based on a single family of POs whereas in other cases a competition between modes based on different types of POs was observed. Furthermore, some lasing modes seemed to be based on diffractive POs, i.e., orbits that impinge directly on a diffractive corner. Such modes could be used as a tool to further investigate the diffraction at dielectric corners.