SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 16: Photonic Quantum Technologies (joint session Q/QI)
Q 16.8: Talk
Tuesday, March 7, 2023, 12:45–13:00, A320
Towards time-multiplexed pseudo-on-demand generation of single-photons in the C-band based on SPDC — •Xavier Barcons Planas1,2,3, Leon Meßner1,2,3, Helen Chrzanowski2, and Janik Wolters2,3 — 1Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany — 2Institute of Optical Sensor Systems, German Aerospace Center (DLR), Berlin, Germany — 3Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Germany
The deterministic generation of single photons is crucial for photonic quantum technology applications. Spontaneous parametric down-conversion (SPDC) is one of the most prominent processes for the generation of single-photons, where a classical pump beam can spontaneously convert into (entangled) pairs of signal and idler photons. Despite significant advantages in the versatility and the possibility of room-temperature operation, photon-pairs are emitted probabilistically because of the spontaneous nature of the process. We present first results of our efforts to overcome this limitation through temporal multiplexing [1]. We herald the presence of the signal photon from a monolithic cavity SPDC source [2] by detecting the corresponding idler, and store the signal in a highly-efficient storage loop [3]. The synchronization of the source with the memory provides a pseudo-on-demand single-photon source.
[1] E. Meyer-Scott et al., Rev. Sci. Instrum. 91, 041101 (2020).
[2] R. Mottola et al., Opt. Express 28, 3159 (2020).
[3] T. Pittman et al., Phys. Rev. A 66, 042303 (2002).