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Q: Quantenoptik
Q 20: Quantum Effects I
Q 20.1: Talk
Wednesday, April 4, 2001, 15:45–16:00, H 2013
Quantum Optics Experiments with Semiconductor Quantum Dots — •Christoph Becher1, Alper Kiraz1, Peter Michler1,2, Atac İmamoğlu1, Lidong Zhang1, Evelyn Hu1,3, Winston V. Schoenfeld3, and Pierre M. Petroff1,3 — 1Department of Electrical & Computer Engineering, University of California, Santa Barbara, CA 93106, USA — 2Institut für Festkörperphysik, Universität Bremen, 28334 Bremen — 3Materials Department, University of California, Santa Barbara, CA 93106, USA
We present quantum optics experiments with single self-assembled InAs quantum dots (QD). We experimentally observe photon antibunching in fluorescence from a single QD which proves the atom-like nature of single QDs at cryogenic temperatures. We investigate cavity-QED effects by tuning the emission of a single QD located in a microdisk resonator into resonance with a high-quality factor whispering gallery mode. In resonance we observe a shortening of the spontaneous emission lifetime, i.e. Purcell effect. Based on these results we demonstrate a source for heralded (triggered) single photons (single photon turnstile device) based on pulsed laser excitation of a single QD with nearly 100% efficiency.