title: Electromagnetically induced transparency in cesium vapor with probe pulses on the single-photon level.
abstract: We perform electromagnetically induced transparency (EIT) experiments in cesium vapor with pulses on the single-photon level for the first time. This was made possible by an extremely large total suppression of the EIT coupling beam by 118 dB mainly due to a newly developed triple-pass planar Fabry-Pérot etalon filter. Slowing and shaping of single-photon light pulses as well as the generation of pulses suitable for quantum key distribution applications and testing of approaches for single photon storage is demonstrated. Our results extend single-photon EIT to the particularly interesting wavelength of the Cs D1 line.
authors.affiliation: Nano Optics, Institute of Physics, Humboldt-Universität zu Berlin, Hausvogteiplatz 5-7 10117 Berlin, Germany. david.hoeckel@physik.hu-berlin.de
authors.forename: David
authors.initials: D
authors.lastname: Höckel
authors.forename: Oliver
authors.initials: O
authors.lastname: Benson