Pure single photon generation by type-I PDC with backward-wave amplification

Abstract

We explore a promising method of generating pure heralded single photons. Our approach is based on parametric downconversion in a periodically-poled waveguide. However, unlike conventional downconversion sources, the photon pairs are counter-propagating: one travels with the pump beam in the forward direction while the other is backpropagating towards the laser source. Our calculations reveal that these downconverted two-photon states carry minimal spectral correlations within each photon-pair. This approach offers the possibility to employ a new range of downconversion processes and materials like PPLN (previously considered unsuitable due to their unfavorable phasematching properties) to herald pure single photons over a broad frequency range.

8 pages, 3 figures, minor text changes and reformatting

References in corpus (6)

• Quantum information with continuous variables
• Heralded Generation of Ultrafast Single Photons in Pure Quantum States
• Simple Scheme for Efficient Linear Optics Quantum Gates
• Counter-propagating entangled photons from a waveguide with periodic nonlinearity
• Entangled-Photon Generation from Parametric Down-Conversion in Media with Inhomogeneous Nonlinearity
• Quantum properties of counter-propagating two-photon states generated in a planar waveguide

Cited by in corpus (15)

• Engineered optical nonlinearity for a quantum light source
• Optimised generation of heralded Fock states using parametric down conversion
• Design Considerations for High-purity Heralded Single Photon Sources
• Compact source of narrow-band counterpropagating polarization-entangled photon pairs using a single dual-periodically poled crystal
• Counter-propagating photon pair generation in a nonlinear waveguide
• Integrated Photonic Sensing
• Creating mid-infrared single photons
• Heralding pure single photons: a comparision between counter-propagating and co-propagating twin photons
• Nonlinear Domain Engineering for Quantum Technologies
• Critical behaviour of coherence and correlation of counterpropagating twin beams
• Counter-propagating spontaneous four wave mixing: photon-pair factorability and ultra-narrowband single photon
• Counter-propagating spectrally uncorrelated biphotons at 1550 nm generated from periodically poled MTiOXO4 (M = K, Rb, Cs; X = P, As)
• Temporal coherence and correlation of counterpropagating twin photons
• Squeezing and EPR correlation in the Mirrorless Optical Parametric Oscillator
• Narrow-band photonic quantum entanglement with counterpropagating domain engineering