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Q: Fachverband Quantenoptik und Photonik
Q 43: QI Poster II (joint session QI/Q)
Q 43.64: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
Towards a compact polarization entanglement source based on WGMR — •Sheng-Hsuan Huang1,2, Thomas Dirmeier1,2, Golnoush Shafiee1,2, Alexander Otterpohl1,2, Florian Sedlmeir1,2, Dmitry Strekalov3, Gerd Leuchs1,2, and Christoph Marquardt1,2 — 1Max-Planck-Institute for the Science of Light, Erlangen, Germany — 2Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany — 3Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91108, USA
Crystalline Whispering Gallery Mode Resonators (WGMR) made from nonlinear materials have been proven to be compact and efficient sources of quantum states, e.g. squeezed states [1] or narrow-band heralded single photons[2,3]. Another feature of WGMR is, that it is possible to couple two pump beams propagating in opposite directions at the same time. As a result, we can treat the WGMR similar to a Sagnac interferometer which is simultaneously a pair of two independent and indistinguishable SPDC sources. Combined, these features make WGMR a potential platform for developing compact and narrow-band entanglement sources.
In our presentation, we discuss the concept and progress of developing a compact polarization entanglement source based on a WGMR that is pumped from two directions.
[1]A. Otterpohl, et.al., Optica 6, 1375-1380 (2019)
[2]J. U. Fürst, et al., Physical review letters 104.15 153901 (2010)
[2]M. Förtsch, et al., Physical Review A 91(2) 023812 (2015)