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DY: Fachverband Dynamik und Statistische Physik

DY 55: Poster - Quantum Systems

DY 55.4: Poster

Donnerstag, 19. März 2015, 16:00–18:00, Poster A

3D emission profiles of disk-limacon-coupled resonators — •Jakob Kreismann and Martina Hentschel — TU Ilmenau, FG Theoretische Physik II, Postfach 10 05 65, 98684 Ilmenau

Microcavity lasers made of dielectric disk-shaped resonators with sizes in the micrometer range have gained a lot of interest in recent years. A drawback of pure disk resonators for microlaser applications is their isotropic light output. To overcome this problem, deformed cavities were proposed such as limacon-shaped resonators which display directional light emission attractive for microcavity lasers.

In this work we study the coupling of a disk resonator to a limacon-shaped cavity using three dimensional FDTD wave-calculations. For this purpose a limacon resonator is placed on top of a disk resonator, a whispering gallery mode with high Q-factor is excited inside the disk resonator and its coupling into the limacon cavity is analyzed for different geometric configurations. Furthermore we investigate the directional light emission and its tuning in such microcavity arrangements. In detail we calculate a full three dimensional emission profile with respect to the limacon cavity size and its position on the disk resonator. Thus we obtain the direction of light output in 3D and its benefit for microcavity laser applications.