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Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics II

Q 31.60: Poster

Tuesday, March 24, 2015, 17:00–19:00, C/Foyer

Multi-mode Theory of a Quantum FEL — •Rainer Endrich1, Enno Giese1, Peter Kling1,2, Wolfgang P. Schleich1, and Roland Sauerbrey21Institut für Quantenphysik, Universität Ulm, 89069 Ulm, Germany — 2Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany

Free-Electron Lasers (FELs) provide coherent and widely tunable radiation of high brilliance. Most theoretical descriptions of these devices are based on classical physics in agreement with experimental results. However, due to the experimental progress in recent years an FEL in the so-called quantum regime (Quantum FEL), which possesses more favorable radiation properties than its classical counterpart and which can only be described by quantum mechanics, seems to be feasible. We have developed a new approach in this regime based on the two-level behavior of the electrons interacting with a one-dimensional single-mode within the framework of a single-particle model. We now extend this model to three spatial dimensions and include spontaneous emission similar to that of a two-level atom. In particular, we investigate this radiation mechanism, derive the corresponding decay constant and discuss the fundamental differences in comparison to atom optics.

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