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Q: Fachverband Quantenoptik und Photonik
Q 61: Quantum Effects (Cavity QED)
Q 61.3: Vortrag
Freitag, 15. März 2019, 11:00–11:15, S Gr. HS Maschb.
Continous and coherent field generation on the single-photon level by a single atom — •Nicolas Tolazzi, Bo Wang, Jonas Neumeier, Tatjana Wilk, and Gerhard Rempe — Max Planck Institute of Quantum Optics, Hans-Kopfermann-Straße 1, 85748 Garching
We report on the observation of continuous and coherent frequency generation using a single atom inside of an optical high finesse resonator via a four wave mixing process. This effect uses a closed cycle in the system’s energy level structure to produce a new and continuous output field on the level of single photons when driven with appropriate input fields. Along the path of bringing the input driving fields to the level of individual photons we present three different experimental configurations in this system each with a successively lower number of classical driving beams while maintaining an output on the level of single photons. We investigate the newly generated field in the spectral domain by heterodyne detection as well as its photon statistics by means of the g(2) correlation function which shows substantially different features for different driving configurations. We show that the output field exhibits non-classical photon correlations with very long coherence times when we exploit the energy level structure available in the strong coupling regime of cavity quantum electrodynamics. In this situation the photon statistic of the output field can be tuned all optically from sub- to super-Poissonian by just changing the power of one of the input fields.