Regensburg 2007 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 13: Poster 1

HL 13.13: Poster

Montag, 26. März 2007, 15:00–17:30, Poster A

Optical Modes in Semiconductor Microtube Resonators — •Christoph Matthias Schultz, Hagen Rehberg, Christian Strelow, Holger Welsch, Christian Heyn, Detlef Heitmann, and Tobias Kipp — Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg

In our recent work we demonstrate that microtubes can act as optical ring resonators [1]. These microtubes are prepared by optical lithography and wet-etching techniques using the self-rolling mechanism of strained bilayers. We observe sharp modes which were probed by the photoluminescence of either InAs quantum dots or InGaAs quantum wells embedded in the tube’s wall. The modes show a specific fine structure. We analyze the mode energies regarding the localization along the tube’s axis and other typical tube parameters. Our previous theoretical model [1] was expanded by an approximation taking into account the actual tube geometry. The modes show anisotropic radiation behavior. We discuss the possibility of unidirectional emission of light.
We acknowledge financial support from the Deutsche Forschungsgesellschaft via SFB 508 and the Graduiertenkolleg 1286.
[1]: T.Kipp et al., Phys. Rev. Lett. 96, 077403 (2006)