https://doi.org/10.1051/epjconf/202328704006
Spin-to-orbital angular momentum transfer by second harmonic generation in thin dielectric films
1 CNIT and Department of Information Engineering, University of Brescia, Via Branze, 38 - Brescia, 25123, Italy
2 Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Via Branze, 45 - Brescia, 25123, Italy
3 Laboratoire MPQ, Université Paris Cité CNRS, 10 rue A. Domon et L. Duquet, 75013 Paris, France
4 Charles M. Bowden Research Center, Redstone Arsenal, AL 35898-5000
5 Université Grenoble Alpes, CEA, IRIG-PHELIQS, Grenoble, France
* e-mail: domenico.deceglia@unibs.it
Published online: 18 October 2023
We demonstrate spin-to-orbital angular momentum transfer in the bulk of nonlinear optical materials with a crystal symmetry that couples the longitudinal component of the pump field. Our predictions are exper-imentally confirmed with a thin film of gallium arsenide, which generates vortex beams of second-harmonic light when pumped with a CP Gaussian beam.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
