Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 11: Ultra-cold plasmas and Rydberg systems

A 11.1: Poster

Dienstag, 12. März 2019, 16:30–18:30, S Fobau Physik

On-demand single-photon source based on thermal Rubidium — •Florian Christaller, Fabian Ripka, Hao Zhang, Harald Kübler, Robert Löw, and Tilman Pfau — 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart

Photonic quantum devices based on atomic vapors at room temperature are intrinsically reproducible as well as scalable and integrable. Besides quantum memories for single photons one key device in the field of quantum information processing are on-demand single-photon sources. A promising candidate for realization relies on the combination of four-wave mixing and the Rydberg blockade effect, as was demonstrated for ultracold atoms [1] and recently for room-temperature atoms in a micro-cell [2].

An important ingredient for strong cooperative interaction effects, like the Rydberg blockade, is the optical thickness in the micro-cell. The effect of light-induced atomic desorption (LIAD) [3] has demonstrated to be a suitable technique. With it, atoms absorbed at the glass surfaces of the micro-cell are desorbed optically by an intense ns-pulse of green light. By this, the optical thickness can be optically triggered from near zero to above one on the ns-timescale. Here we report on the latest LIAD measurements and on the status towards the high repetition rate single-photon generation at room-temperature.

[1] Dudin et al., Science 336, 6083 (2012)

[2] Ripka et al., Science 362, 6413 (2018)

[3] Atunov et al., Phys. Rev. A 67, 053401 (2003)