Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 93: Poster Session: Metal-Semiconductor Hybrid Systems, Plasmonic Systems / Photonic Crystals / Carbon: Diamond & CNT / Quantum Information Systems

HL 93.13: Poster

Donnerstag, 29. März 2012, 16:00–19:00, Poster D

Semiconductor Colloidal Nanocrystals in PMMA Microresonators — •Felix Büchle, Daniel Rülke, Tobias Grossmann, Michael Hetterich, and Heinz Kalt — Institut für Angewandte Physik and Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße 1, 76131 Karlsruhe, Germany

Our work is based on the incorporation of colloidal CdSe/ZnS core-shell quantum dots (QDs) into the light-confining environment of high-Q (up to 10⁶) optical PMMA microresonators fabricated by standard e-beam lithography and a subsequent etching process. QDs have been embedded into the PMMA matrix, mainly by direct mixing into the resist or via layer-by-layer deposition of QD films sandwiched between the resonator-forming PMMA layers, respectively. We focus on the investigation of the interaction between the nanocrystal emitter and the surrounding modal structure of the high-Q conical microresonators in the context of cavity-quantum-electrodynamics as well as on a possible realisation of low-threshold lasing from densely packed QD layers inside the resonator.