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DY: Fachverband Dynamik und Statistische Physik

DY 29: Quantum Chaos I

DY 29.5: Talk

Thursday, March 17, 2011, 11:15–11:30, ZEU 255

Whispering Gallery Modes by Partial Barriers in Deformed Microcavities — •Jeong-Bo Shim¹, Jan Wiersig¹, and Hui Cao² — ¹Institut für Theoretische Physik, Otto-von-Guericke-Universität Magdeburg, D-39106, Magdeburg, Germany — ²Department of Applied Physics, Yale University, New Haven, Connecticut 06520-8482, USA

The idea of deformed optical micorcavities was first suggested to induce a directional light emission from the whispering gallery modes. However, it is still not easy to control the optical properties of the whispering gallery modes such as the emission directionality or the quality factor due to the chaotic internal ray dynamics.

In this work, we introduce the possibility that the remnant of a dynamical invariant structure in the phase space of the deformed microcavity, the so-called partial barrier play a role of an unbroken tori due to the openness of the system. Using the semiclassical approach, the spectrum of the microcavity is qualtitatively analyzed in the short wavelength regime. As a result, we are able to predict the spectral and emissional properties of the microcavity along with a good agreement between the theoretical analysis and the numerically obtained spectrum.