Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 16: Quanteneffekte (Interferenz und Korrelationen)
Q 16.5: Vortrag
Montag, 19. März 2007, 17:30–17:45, 5E
Photon statistics in the cooperative spontaneous emission — •Vasily V. Temnov and Ulrike Woggon — Experimentelle Physik IIb, Universität Dortmund, Otto-Hahn-Str. 4, 44221 Dortmund, Germany
The statistics of photons emitted by an incoherently pumped ensemble of N two-level systems coupled to a single damped cavity mode is investigated numerically by Monte-Carlo simulations [1]. Below the lasing threshold the second-order photon correlation function g2(τ) shows a giant photon bunching with g2(0)>>1, strongly exceeding the bunching factor g2(0)∼ 2 for thermal radiation. The dependence of bunching behavior on the homogeneous, inhomogeneous broadening and the number of emitters N in the atomic ensemble is investigated. The maximum bunching factor is found for N=2 and is explained by the cooperative evolution through the superradiant (Dicke) states [2] resulting in the emission of photon pairs.
[1] V.V. Temnov and U. Woggon, Phys. Rev. Lett. 95, 243602 (2005)
[2] R.H. Dicke, Phys. Rev. 93, 99 (1954)