Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 33: Optical properties I

HL 33.2: Vortrag

Dienstag, 1. April 2014, 09:45–10:00, POT 006

Optical semiconductor microtube resonators coupled to chemically synthesized, light-emitting nanostructures — •Stefanie Kietzmann1, Christian Strelow1, Andreas Schramm2, Jussi-Pekka Penttinen2, Alf Mews1, and Tobias Kipp11Institut für Physikalische Chemie, Universität Hamburg, Deutschland — 2Optoelectronics Research Centre, Tampere University of Technolgy, Tampere, Finland

We investigate the interaction of rolled-up AlInP microtubes with colloidal nanoemitters. AlInP is especially interesting, being transparent in the visible spectral range. The thin walls of the microtubes cause evanescent fields, to which the emitters can couple and emit their light into the microtubes' walls where it is confined by total internal reflection. Constructive interference cause the formation of sharp eigenmodes. Their properties sensitively depend on the material and geometry of the microtubes. Lithographic techniques allow for a full control of the three-dimensional light confinement and the resulting eigenspectrum [1]. Easily fabricated by selectively undercutting epitaxally grown strained multilayer systems, AlInP microtubes allow for a variety of applications. As the eigenmode energies sensitively depend on the refractive index of tube's surrounding, they are perfect candidates for micrometer scaled refractive index sensors. Measurements and FDTD simulations of a microtube with varying surrounding materials are presented that demonstrate the refractometer properties of our microtubes [1]. We acknowledge financial support by the DFG via Ki1257/1. [1] Ch. Strelow et.al. Appl. Phys. Lett. 101, 113114 (2012)

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