Full-mode Characterisation of Correlated Photon Pairs Generated in Spontaneous Downconversion
arXiv:2103.08689 · doi:10.1364/OL.424619
Abstract
Spontaneous parametric downconversion is the primary source to generate entangled photon pairs in quantum photonics laboratories. Depending on the experimental design, the generated photon pairs can be correlated in the frequency spectrum, polarisation, position-momentum, and spatial modes. Exploring the spatial modes' correlation has hitherto been limited to the polar coordinates' azimuthal angle, and a few attempts to study Walsh modes radial states. Here, we study the full-mode correlation, on a Laguerre-Gauss basis, between photon pairs generated in a type-I crystal. Furthermore, we explore the effect of a structured pump beam possessing different spatial modes onto bi-photon spatial correlation. Finally, we use the capability to project over arbitrary spatial mode superpositions to perform the bi-photon state's full quantum tomography in a 16-dimensional subspace.
arXiv comment10 Pages,7 Figures, to be submitted
References in corpus (20)
- Entanglement of Orbital Angular Momentum States of Photons
- Photonic quantum information processing: a review
- Laguerre-Gaussian mode sorter
- Spatial correlations in parametric down-conversion
- Measuring Entangled Qutrits and Their Use for Quantum Bit Commitment
- Generation and Confirmation of a (100x100)-dimensional entangled Quantum System
- Spontaneous parametric down-conversion
- Physical meaning of the radial index of Laguerre-Gauss beams
- Full characterisation of the quantum spiral bandwidth of entangled biphotons
- Full-field quantum correlations of spatially entangled photons
- High-Dimensional Pixel Entanglement: Efficient Generation and Certification
- Measuring azimuthal and radial modes of photons
- Lost and found: the radial quantum number of Laguerre-Gauss modes
- Experimental investigation of high-dimensional quantum key distribution protocols with twisted photons
- Gouy Phase Radial Mode Sorter for Light: Concepts and Experiments
- Quantum state engineering with twisted photons via adaptive shaping of the pump beam
- Coherent manipulation of a three-dimensional maximally entangled state
- Realization of a scalable Laguerre-Gaussian mode sorter based on a robust radial mode sorter
- Radial coherent and intelligent states of paraxial wave equation
- Using all transverse degrees of freedom in quantum communications based on a generic mode sorter
Cited by in corpus (7)
- Entanglement-Based Quantum Information Technology
- Conformal frequency conversion for arbitrary vectorial structured light
- Biphoton State Reconstruction via Phase Retrieval Methods
- Conservation of angular momentum on a single-photon level
- Spectral Properties of Transverse Laguerre-Gauss Modes in Parametric Down-Conversion
- Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre-Gaussian beams
- Entangled ripples and twists of light: Radial and azimuthal Laguerre-Gaussian mode entanglement