Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster: Quantum Optics and Photonics I

Q 15.46: Poster

Monday, March 23, 2015, 17:00–19:00, C/Foyer

Towards the Realization of a Vacuum-Ultraviolet Photon Bose-Einstein Condensate — •Christian Wahl, Gunar Wallstabe, Stavros Christopoulos, Jan Klaers, 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 here plan to use absorption re-emission cycles of the transition from the ground to the the lowest electronically excited state of e.g. xenon for thermalisation. In order to achieve a sufficient overlap between the first atomic absorption and the di-atomic excimer emission, found 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. Ongoing 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)