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Q: Fachverband Quantenoptik und Photonik
Q 16: Quanteneffekte (Interferenz und Korrelationen)
Q 16.2: Vortrag
Montag, 19. März 2007, 16:45–17:00, 5E
Photon antibunching from a single qantum dot-microcavity system in the strong coupling regime — •Stephan Götzinger1, David Press1, Yoshihisa Yamamoto1, Stephan Reitzenstein2, Carolin Hofmann2, Andreas Löffler2, Martin Kamp2, and Alfred Forchel2 — 1E. L. Ginzton Laboratory, Stanford University, Stanford California 94305, USA — 2Technische Physik, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
Strong coupling in solid state systems is of great interest for a variety of quantum information applications. Although it has been demonstrated in several quantum dot-microcavity configurations, it was not verified that the system had one and only one emitter.
In our experiment, we observe antibunching in the photons emitted from a strongly-coupled single quantum dot and pillar microcavity on resonance. When the quantum dot was spectrally detuned from the cavity mode, the cavity emission remained antibunched, and also anticorrelated from the quantum dot emission [1]. Resonant pumping of the selected quantum dot via an excited state enabled these observations by eliminating the background emitters that are usually coupled to the cavity. This device demonstrates an on-demand single-photon source operating in the strong coupling regime, with a Purcell factor of 61 and a quantum efficiency of 97%.
[1] D. Press et al., quant-ph/0609193.