Dresden 2011 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 1: Invited Talk: Erik Stock
HL 1.1: Hauptvortrag
Montag, 14. März 2011, 10:15–10:45, FOE Anorg
Self-organized quantum dots as single and entangled photon emitters — •Erik Stock1, Waldemar Unrau1, Anatol Lochmann1, Andrei Schliwa1, Murat Öztürk1, Askhat Bakarov2, Aleksandr Toropov2, Ilia Derebrezov2, Vladimir Haisler2, and Dieter Bimberg1 — 1Institut für Festkörperphysik, TU-Berlin, 10623 Berlin, Germany — 2Institute of Semiconductor Physics, 630090 Novosibirsk, Russia
We realized a highly efficient single photon source (SPS) based on on a single electrically driven InGaAs/GaAs QD. Our resonant cavity light emitting diode (RLED) generates single polarized photons at a repetition rate of 1 GHz [1] exhibiting a second order correlation function g(2)(0) = 0. The operating temperature can be increased up to 80 K still preserving non-classical light emission.
To study the photon characteristic of the RCLED we used superconducting single photon detectors (SSPD). Photon cross correlation measurements on the exciton (X) and biexciton (XX) luminescence emission results in a time delay of less than 70 ps [2].
A promising candidate for the generation of entangled photons are QD grown on (111) GaAs substrate. Mikro-photoluminescence spectroscopy on single QDs demonstrates a fine structure splitting < 10 µeV limited by the spectral resolution of our setup [3]. This work was partly funded by the SFB 787.
[1]D. Bimberg et al., IEEE Photonics Journal 1, 58 (2009) [2]E. Stock, et al Semicond. Sci. Technol. 26, 014003 (2011) [3]E. Stock et al., Appl. Phys. Lett. 96, 093112 (2010)