Erlangen 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.36: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal
Sagnac-type setup for the generation of tunable polarization entangled photon pairs — •Golnoush Shafiee1,2, Gerhard Schunk1,2, Florian Sedlmeir1,2, Alexander Otterpohl1,2, Ulrich Vogl1,2, Dmitry Strekalov1,2, Harald G. L. Schwefel3, Gerd Leuchs1,2, and Christoph Marquardt1,2 — 1MPL, Erlangen, Germany — 2Institute of Optics, FAU, Erlangen, Germany — 3University of Otago, Dunedin, New Zealand
Single photons and photon pairs are an important resource for quantum information processing. Our compact source of photon pairs [1] and squeezed light [2] is based on spontaneous parametric down conversion (SPDC) in a triply resonant whispering-gallery resonator (WGR) made of lithium niobate. Signal and idler radiation inside the resonator have each been demonstrated to be single mode. The central wavelength of the emitted light can be tuned over hundreds of nanometers [3]. Currently, we investigate PDC in counter-propagating modes of a single WGR. We want to show identicality between the counterpropagating signals (or idlers) by studying interference above and below the oscillation threshold.
In this compact and monolithic system, we want to generate identical single photons from two independent sources, which opens up novel possibilities for the creation of polarization-entangled photon pairs for proposed quantum repeater schemes.
[1] M. Förtsch et al., Nat. Commun. 4, 1818 (2013). [2] J. U. Fürst et al., Phys. Rev. Lett. 106, 113901(2011). [3] G. Schunk et al., Optica 2, 773-778 (2015).