Controlling the transverse correlation in quasi-phase matching parametric down-conversion
| Autor: | Aldo Delgado, O. Cosme, Carlos H. Monken, S. Pádua, Gustavo Lima |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Physics
Quasi-phase-matching Spatial correlation Photon business.industry Physics::Optics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Transverse plane Optics Spontaneous parametric down-conversion Modulation Electrical and Electronic Engineering Physical and Theoretical Chemistry business Beam (structure) Parametric statistics |
| Zdroj: | Optics Communications. 507:127669 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2021.127669 |
| Popis: | In this work we study the transverse spatial correlation of the pair of photons generated via the process of spontaneous parametric frequency down-conversion, in periodically poled non-linear crystals illuminated by a pulsed laser beam. It is well known that the two-photon state generated in quasi-phase matching (QPM) configurations depends explicitly on the characteristics of the pump beam, on the crystal modulated non-linearity, and on the detection geometry. This has allowed the development of several techniques for controlling the biphoton spectral and spatial properties. Here we discuss another technique for implementing the spatial entanglement modification in QPM gratings. We show, theoretically and experimentally, that in nearly collinear geometries, the spatial shape modulation of the pump beam allows for the control of the biphoton transverse spatial correlation. |
| Databáze: | OpenAIRE |
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