Dresden 2006 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 18: Symposium Quantum optics in semiconductors II
HL 18.2: Fachvortrag
Dienstag, 28. März 2006, 15:45–16:00, HSZ 01
CQED with II-VI nanocrystals — •Ulrike Woggon1, Nicolas LeThomas1, Oliver Schoeps1, and Mikhail Artemyev2 — 1FB Physik, University Dortmund, Otto-Hahn-Str. 4, 44227 Dortmund — 2Minsk State University, Minsk, Belarussia
Cavity QED concepts stimulated a tremendous technological development towards solid-state based, compact, and scalable cavity QED systems. In this contribution we report on a strongly coupled cavity QED system consisting of a CdSe nanocrystal coupled to a single photon mode of a polymer microsphere. The strong exciton-photon coupling is manifested by the observation of a cavity mode splitting of ℏ ω ≈ 37 µeV and photon lifetime measurements of the coupled exciton-photon state. The single photon mode is isolated by lifting the mode degeneracy in a slightly deformed microsphere and addressing it by high-resolution imaging spectroscopy. This cavity mode is coupled to a localized exciton of an anisotropically shaped CdSe nanocrystal on the microsphere surface that emits highly polarized light in resonance to the mode. With colloidal CdSe NRs we add a new material class for which solid-state based cavity QED was implemented.