Darmstadt 2008 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 56: Quanteninformation (Photonen und nichtklassisches Licht I)
Q 56.3: Talk
Friday, March 14, 2008, 11:30–11:45, 1A
Realization of two indistinguishable Fourier-limited solid state single-photon sources — Robert Lettow1, Ville Ahtee2, Alois Renn1, Erkki Ikonen2, •Stephan Götzinger1, and Vahid Sandoghdar1 — 1Laboratory of Physical Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland — 2Metrology Research Institute, Helsinki University of Technology , FI-02015 TKK, Finland
Single-photon sources comprise an important building block in many quantum information processing schemes. The feasibility of such sources has been demonstrated in various systems. Single photons have also already been successfully used for applications in quantum cryptography. However, complex schemes of quantum information processing require a large number of indistinguishable photons from independent sources.
We demonstrate indistinguishable Fourier-limited single-photon sources based on two single molecules [1]. High resolution laser spectroscopy and optical microscopy were combined to identify individual molecules in two independent microscopes. The Stark effect was exploited to shift the transition frequency of a given molecule and thus obtain single-photon sources with perfect spectral overlap. The solid-state aspect of our system offers many advantages including well defined polarization and a nearly indefinite measurement time using the same single emitters. Our experimental arrangement sets the ground for the realization of quantum interference experiments with two independent solid state single-photon sources.
[1] R. Lettow et al., Optics Express 15, 15842 (2007).