Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 80: Enabling Technologies: Cavity QED

FM 80.6: Talk

Donnerstag, 26. September 2019, 15:30–15:45, 2006

Storage and retrieval of short light pulses via fiber-based atom-cavity systems — •Tobias Macha, Lukas Ahlheit, Wolfgang Alt, Maximilian Ammenwerth, Pooja Malik, Deepak Pandey, Hannes Pfeifer, Eduardo Urunuela, and Dieter Meschede — Institut für Angewandte Physik der Universität Bonn, Wegelerstr. 8, 53115, Bonn, Germany

We demonstrate the storage of 5 ns light pulses in a single rubidium atom coupled to a fiber-based optical resonator. Our storage protocol addresses a regime beyond the conventional adiabatic limit, for which the optimal control laser pulse properties are extracted from numerical simulations of the system via a Lindblad master equation approach. We investigate the dependence of the storage efficiency on various control pulse parameters, such as the peak amplitude or the delay with respect to the arrival of the light pulse [1]. For an optimized pulse, we measure storage efficiencies of (8.2±0.9) %, in close agreement with the maximum expected efficiency for our atomic memory. In the adiabatic limit, we use optimized control pulses for single-photon generation by adapting the impedance-matching based storage scheme of Dilley et al. [2]. We achieve probabilities of 66 % for generating a single, arbitrarily-shaped photon into the cavity mode upon a trigger signal. Such well-controlled and high-bandwidth atom-photon interfaces are key components for future hybrid quantum networks.

[1] arXiv:1903.10922 (2019).

[2] PRA 85, 023834 (2012).