Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 1: Quantum Effects: Light Scattering and Propagation I / Interference and Correlations I

Q 1.6: Talk

Monday, March 8, 2010, 15:15–15:30, A 310

Photon-number selective group delay in cavity induced transparency — •Gor Nikoghosyan and Michael Fleischhauer — Department of Physics and research center OPTIMAS, University of Kaiserslautern, Germany

Electromagnetically induced transparency (EIT) is an interference effect that results in a dramatic reduction of the group velocity of a propagating weak probe pulse accompanied by vanishing absorption. The group velocity of the probe depends on the intensity of a coupling field which has to be strong and thus it is usually a classical laser beam. In the present work we propose a scheme where the coupling field is substituted by a quantized cavity field. The adiabatic transfer of probe photons to the cavity mode modifies the refractive index of medium in a similar manner as the coupling field does in the case of ordinary EIT. We show that our system can be used to generate and control quantum pulses of light with very high accuracy. In particular it can be used to spatially separate the single photon from higher photon-number components of a few photon probe pulse and thus to create an optical Fock-state filter or a deterministic single-photon source.