# Heralding pure single photons: a comparision between counter-propagating and co-propagating twin photons

@article{Brambilla2016HeraldingPS, title={Heralding pure single photons: a comparision between counter-propagating and co-propagating twin photons}, author={E. Brambilla and Tommaso Corti and Alessandra Gatti}, journal={Physical Review A}, year={2016}, volume={97} }

We investigate the possibility of generating pure heralded single photons through spontaneous parametric down-conversion comparing the counter-propagating geometry studied in [1] with more conventional co-propagating configurations which enhance the purity of the heralded photon state through the technique of group-velocity matching. We estimate the Schmidt number associated to the temporal modes as a function of the pump pulse duration for three particular configurations, showing how the…

## 4 Citations

Observation of frequency-uncorrelated photon pairs generated by counter-propagating spontaneous parametric down-conversion

- MedicineScientific reports
- 2021

This work reports the generation of frequency-uncorrelated photon pairs from counter-propagating spontaneous parametric down-conversion in a periodically-poled KTP waveguide, a unique feature results from the backward-wave quasi-phase-matching condition and does not has a strict limitation on the material and working wavelength, thus fascinating its application in photonic quantum technologies.

Counter-propagating photon pair generation in a nonlinear waveguide.

- Physics, MedicineOptics express
- 2020

This work reports on the generation of counter-propagating single-photon pairs in a self-made periodically poled lithium niobate waveguide with a poling period on the same order of magnitude as the generated wavelength.

Counter-propagating photon pair generation in a nonlinear waveguide

- 2020

Counter-propagating parametric conversion processes in non-linear bulk crystals have been shown to feature unique properties for efficient narrowband frequency conversion. In quantum optics, the…

Counter-propagating spectrally uncorrelated biphotons at 1550 nm generated from periodically poled MTiOXO4 (M = K, Rb, Cs; X = P, As)

- Materials Science, Physics
- 2020

We theoretically investigated spectrally uncorrelated biphotons generated in a counter-propagating spontaneous parametric downconversion (CP-SPDC) from periodically poled MTiOXO4 (M=K, Rb, Cs; X=P,…

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