Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 37: Quantum Gases (Bosons) IV

Q 37.8: Talk

Tuesday, March 6, 2018, 15:45–16:00, K 2.020

Towards a Photon Bose-Einstein Condensate in the Vacuum-Ultraviolet Spectral Regime — •Christian Wahl, Marvin Hoffmann, Frank Vewinger, and Martin Weitz — IAP, Universität Bonn

We propose an experimental approach for photon Bose-Einstein condensation in the vacuum-ultraviolet spectral regime, based on the thermalisation of photons in a noble gas filled optical microcavity. Our current experiments realizing photon Bose-Einstein condensates operate in the visible spectral regime with organic dyes as a thermalisation medium [1]. To reach the vacuum-ultraviolet spectral regime, we plan to replace the dye medium by high pressure xenon or krypton gas with absorption re-emission cycles on the transition from the ground to the lowest electronically excited state of the noble gases for thermalisation. In order to achieve sufficient spectral overlap between the atomic absorption and the di-atomic excimer emission, noble gas pressures of up to 180 bar will be created inside the cavity. For the case of the heavier noble gases xenon and krypton, emission wavelengths in the 120-160 nm regime seem feasible. The current status of experimental work will be reported.

References

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