Results 41 to 50 of about 169,436 (283)

Measurement of two-photon position–momentum Einstein–Podolsky–Rosen correlations through single-photon intensity measurements

open access: yesNew Journal of Physics, 2022
The measurement of the position–momentum Einstein–Podolsky–Rosen (EPR) correlations of a two-photon state is important for many quantum information applications ranging from quantum key distribution to coincidence imaging.
Abhinandan Bhattacharjee   +2 more
doaj   +1 more source

Towards terahertz detection and calibration through spontaneous parametric down-conversion in the terahertz idler-frequency range generated by a 795 nm diode laser system

open access: yesAPL Photonics, 2018
We study a calibration scheme for terahertz wave nonlinear-optical detectors based on spontaneous parametric down-conversion. Contrary to the usual low wavelength pump in the green, we report here on the observation of spontaneous parametric down ...
Vladimir V. Kornienko   +4 more
doaj   +1 more source

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

open access: yesNanophotonics, 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   +10 more
doaj   +1 more source

Absolute calibration of Analog Detectors using Stimulated Parametric Down Conversion

open access: yes, 2008
Spontaneous parametric down conversion has been largely exploited as a tool for absolute calibration of photon counting detectors, photomultiplier tubes or avalanche photodiodes working in Geiger regime.
G. Brida   +8 more
core   +1 more source

Controlling the Spectrum of Spontaneous Parametric Down-Conversion in Nonlinear Crystals by External Electric Field

open access: yesEPJ Web of Conferences, 2015
. We discuss the possibilities of controlling the spectrum of correlated photons generated via spontaneous parametric down-conversion by using external homogeneous electric field acting on the nonlinear crystal.
Akatiev D.O., Kalachev A.A.
doaj   +1 more source

Understanding High-Gain Twin-Beam Sources Using Cascaded Stimulated Emission

open access: yesPhysical Review X, 2020
We present a new method for the spectral characterization of pulsed twin-beam sources in the high-gain regime, using cascaded stimulated emission. We show an implementation of this method for a periodically poled potassium titanyl phosphate spontaneous ...
Gil Triginer   +7 more
doaj   +1 more source

Nonperturbative theory of spontaneous parametric down-conversion in open and dispersive optical systems

open access: yesPhysical Review Research, 2023
We develop a nonperturbative formulation based on the Green's function quantization method that can describe spontaneous parametric down-conversion in the high-gain regime in nonlinear optical structures with arbitrary amount of loss and dispersion. This
Aleksa Krstić   +2 more
doaj   +1 more source

Polarization Entanglement Purification using Spatial Entanglement [PDF]

open access: yes, 2001
Parametric down-conversion can produce photons that are entangled both in polarization and in space. Here we show how the spatial entanglement can be used to purify the polarization entanglement using only linear optical elements. Spatial entanglement as
Pan, Jian-Wei, Simon, Christoph
core   +2 more sources

Confirming X-ray parametric down conversion by time–energy correlation

open access: yesResults in Physics
We present measurements of X-ray Parametric Down Conversion at the Advanced Photon Source synchrotron facility. Using an incoming pump beam at 22 keV, we observe the simultaneous, elastic emission of down-converted photon pairs generated in a diamond ...
N.J. Hartley   +18 more
doaj   +1 more source

Photon Number Statistics of Multimode Parametric Down-Conversion [PDF]

open access: yesPhysical Review Letters, 2008
5 pages, 3 ...
Avenhaus, M   +5 more
openaire   +4 more sources

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