Results 31 to 40 of about 3,504,323 (217)

Angular Schmidt modes in spontaneous parametric down-conversion [PDF]

Physical Review A, 2011
We report a proof-of-principle experiment demonstrating that appropriately chosen set of Hermite-Gaussian modes constitutes a Schmidt decomposition for transverse momentum states of biphotons generated in the process of spontaneous parametric down conversion.
Straupe, S. S., Ivanov, D. P., Kalinkin, A. A., Bobrov, I. B., Kulik, S. P.   +4 more
openaire   +2 more sources

High-sensitivity quantum sensing with pump-enhanced spontaneous parametric down-conversion

APL Photonics, 2023
Recent years have seen the development of quantum sensing concepts utilizing nonlinear interferometers based on correlated photon pairs generated by spontaneous parametric down-conversion (SPDC).
Chiara Lindner, Jachin Kunz, Simon J. Herr, Jens Kießling, Sebastian Wolf, Frank Kühnemann   +5 more
doaj   +1 more source

Time ordering in spontaneous parametric down-conversion [PDF]

AIP Conference Proceedings, 2011
We consider the multi‐mode parametric down‐conversion Hamiltonian that governs the evolution of the fields inside a nonlinear crystal. If the Hamiltonian does not commute with itself at all times—as is the case for the multimode down‐conversion Hamiltonian—then the expansion of the evolution operator must take the form of the time‐ordered Dyson series,
Branczyk, Agata M., Stace, Thomas M., Ralph, T. C.   +2 more
openaire   +4 more sources

Nonseparable Werner states in spontaneous parametric down-conversion [PDF]

Physical Review A, 2006
The multiphoton states generated by high-gain spontaneous parametric down-conversion (SPDC) in presence of large losses are investigated theoretically and experimentally. The explicit form for the two-photon output state has been found to exhibit a Werner structure very resilient to losses for any value of the gain parameter, g. The theoretical results
DE MARTINI, Francesco, R. PERRIS, SCIARRINO, Fabio, AND V. SECONDI, CAMINATI, Marco Bright   +4 more
openaire   +3 more sources

Supplementary document for Cryogenic integrated spontaneous parametric down-conversion - 5591608.pdf

, 2022
Supplemental Document for Cryogenic integrated spontaneous parametric down ...
Jan Philipp Hoepker (11811794), Christof Eigner (9380099), Tim Bartley (9380105), Nina Lange (11811791), Viktor Quiring (9380096), Raimund Ricken (3979565), Christine Silberhorn (9380102)   +6 more
core   +1 more source

Advances in nonlinear metasurfaces for imaging, quantum, and sensing applications

Nanophotonics, 2023
Metasurfaces, composed of artificial meta-atoms of subwavelength size, can support strong light–matter interaction based on multipolar resonances and plasmonics, hence offering the great capability of empowering nonlinear generation.
Zheng Ze, Rocco Davide, Ren Hang, Sergaeva Olga, Zhang Yipei, Whaley K. Birgitta, Ying Cuifeng, de Ceglia Domenico, De-Angelis Constantino, Rahmani Mohsen, Xu Lei   +10 more
doaj   +1 more source

Enhancement of spontaneous parametric down-conversion in nonlinear metasurfaces

, 2022
Paper FW4H.1We experimentally demonstrate biphoton generation by spontaneous parametric down-conversion in resonant metasurfaces. In our metasurfaces, Mie-type resonances enable over 7 times more efficient biphoton generation compared to an unstructured ...
Younesi, M., Setzpfandt, F., Pertsch, T., Chekhova, M.V., Sultanov, V., Weissflog, M., Staude, I., Fedotova, A., Santiago-Cruz, T.   +8 more
core   +1 more source

Generation of Entangled Photons by A Short Coherence Length Violet Diode Laser

Diyala Journal of Engineering Sciences, 2013
Pumping a BBO crystal by a violet diode laser with a wavelength of (405  nm) output power of (24 mW) and a line width of (3nm) was employed to generate entangled  photons with a wavelength of 810 nm by achieving type II phase matching conditions.
Ra'ad Subhi Abbood, Ahmed I. Khaleel, Shelan Kh. Tawfeeq   +2 more
doaj   +1 more source

Spontaneous parametric down conversion in a nanophotonic waveguide

Optics Express, 2007
Recently, we verified that spontaneous parametric down conversion (SPDC) is enhanced in a waveguide, in agreement with theory showing an inverse dependence on mode confinement [1]. Here we investigate highly-confined nanophotonic waveguides designed to maximize the SPDC rate.
Sean M, Spillane, Marco, Fiorentino, Raymond G, Beausoleil   +2 more
openaire   +2 more sources

Towards spontaneous parametric down-conversion at low temperatures

EPJ Web of Conferences, 2017
The possibility of observing spontaneous parametric down-conversion in doped nonlinear crystals at low temperatures, which would be useful for combining heralded single-photon sources and quantum memories, is studied theoretically.
Akatiev Dmitrii, Boldyrev Kirill, Kuzmin Nikolai, Latypov Ilnur, Popova Marina, Shkalikov Andrey, Kalachev Alexey   +6 more
doaj   +1 more source