Die DPG-Frühjahrstagung in Hannover musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 13: Posters: Quantum Optics and Photonics I

Q 13.33: Poster

Montag, 9. März 2020, 16:30–18:30, Empore Lichthof

Fast Photon Storage in an Atom-Cavity System with Raman Cooling — •Lukas Ahlheit, Wolfgang Alt, Maximilian Ammenwerth, Tobias Macha, Pooja Malik, Deepak Pandey, Hannes Pfeifer, Eduardo Uruñuela, and Dieter Meschede — Institute for Applied Physics, Bonn, Germany

Atoms coupled to a high bandwidth fiber-cavity are a promising platform for storing temporally short photons, a versatile information carrier in quantum networks.

In our system the atoms are trapped in a 3D-lattice at the center of the fiber cavity and pre-cooled with a degenerate raman sideband cooling technique [1]. Then carrier-free Raman cooling is used to prepare them close to the 3D motional ground state using the intra-cavity blue detuned dipole trap and a DBR laser. In order to phase lock the DBR to the dipole trap laser, the linewidth of the DBR laser is reduced by optical feedback through a meter-long external cavity to a few tens of kHz.

Photon storage is accomplished with the D2 line of ⁸⁷Rb through a cavity-assisted two photon Raman process in Λ-configuration. This promises photon generation and storage in a controlled and deterministic way with improved efficiencies compared to our previous work [2]. The simulation for the expected storage efficiency along with the experimental findings are presented.
[1] E. Uruñuela, et al., arXiv:1909.08894 (2019)

[2] T. Macha, et al., arXiv:1903.10922 (2019)