Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 8: Enabling Technologies: Sources of Quantum States of Light I

FM 8.3: Talk

Montag, 23. September 2019, 14:45–15:00, 1010

Towards Synchronization of Photons from a SPDC Source — •Janik Wolters1,3, Chris Müller2, Gianni Buser3, Roberto Mottola3, Tim Kroh2, Sven Ramelow2, Oliver Benson2, and Philipp Treutlein31DLR Institut für optische Sensorsysteme, Berlin — 2HU Berlin, Institut für Physik — 3Universität Basel, Departement Physik

Photonic quantum technologies have a striking need for photon sources that emit coherent, single mode photons, on demand with high efficiency, and can be built in a reproducible fashion. To satisfy this need, we follow a compound approach [1]: The probabilistic generation of photons by spontaneous parametric downconversion (SPDC) [2] is synchronized with an atomic vapor quantum memory [3].

As a key component of the envisioned compound source, we present an efficient, bright and robust source of photons at the rubidium D1-line (795 nm), based on non-degenerate SPDC in a monolithic cavity.

First experimental results on combining the source with a previously developed Rb vapor memory [3] are presented. Single photons are stored and read out with a signal to noise ratio well above unity. Second order correlation measurements reveal the preservation of non-classicality after photon readout.

[1] J. Nunn, et al., Phys. Rev. Lett. 110, 133601 (2013).

[2] A. Ahlrichs et al., Applied. Phys. Lett. 108, 021111 (2016).

[3] J. Wolters et al., Phys. Rev. Lett. 119 060502 (2017).

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