Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 5: Quantum Optics I

Q 5.1: Vortrag

Montag, 29. Februar 2016, 11:00–11:15, f442

Towards the Realization of a Vacuum-Ultraviolet Photon Bose-Einstein Condensate — •Christian Wahl, Rudolf Brausemann, Johannes Koch, Stavros Christopoulos, and Martin Weitz — University of Bonn, Germany

We propose a new approach for photon Bose-Einstein condensation, based on thermalisation of photons in a noble gas filled optical microcavity, suitable for the vacuum-ultraviolet spectral regime, i.e. in the 100-200nm wavelength regime. While current experiments on photon Bose-Einstein condensation use thermalisation of photons in a dye solution filled optical microcavity in the visible spectral regime [1],we plan to use absorption re-emission cycles on the transition from the ground to the lowest electronically excited state of noble gases, e.g. xenon, for thermalisation. In order to achieve a sufficient spectral overlap between the lowest atomic absorption and the di-atomic excimer emission, centered at 147nm and 170nm respectively [2], a noble gas pressure of up to 60 bar will be created inside the cavity. We are currently in the process of setting up an experiment to study absorption and emission spectra at the relevant noble gas pressures in the vacuum-ultraviolet regime. Current experimental progress will be reported.

References:

[1]: J. Klaers et al. Nature 468, 545-548 (2010)

[2]: M. Kink et al. Physica Scripta 45, 79-82 (1992)