Dresden 2017 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 61: Posters - Quantum Systems
DY 61.3: Poster
Donnerstag, 23. März 2017, 17:00–19:30, P1A
Separatrix modes in weakly deformed microdisk cavities — •Chang-Hwan Yi1,2, Jullius Kullig2, Ji-Won Lee1, Ji-Hwan Kim1, Hyeon-Hye Yu3, Jan Wiersig2, and Chil-Min Kim1 — 1Department of Emerging Materials Science, DGIST, Daegu 711-873, Korea — 2Institut für Theoretische Physik, Otto-von-Guericke-Universität Magdeburg, Postfach 4120, D-39016 Magdeburg, Germany — 3Department of Physics, Sogang University, Seoul 121-742, Korea
Quasi stationary modes in deformed dielectric microdisk cavities show an unexpected localization along unstable periodic ray orbits. We reveal a mechanism for this kind of localization in weakly deformed cavities. In such systems the ray dynamics is nearly integrable and its phase space contains small island chains. When increasing the deformation the enlarging islands incorporate more and more modes. Each time a mode comes close to the border of an island chain (separatrix) the mode exhibits a strong localization near the corresponding unstable periodic orbit. Using an Einstein-Brillouin-Keller quantization scheme taking into account the Fresnel coefficients we derive a frequency condition for the localization. Observing far field intensity patterns and tunneling distances, reveals small differences in the emission properties.