Second harmonic generation of spatiotemporal optical vortices and conservation of orbital angular momentum
Optics
2021-02-19 v2
Abstract
Spatiotemporal optical vortices (STOVs) are a new type of intrinsic optical orbital angular momentum (OAM) structure in which the OAM vector is orthogonal to the propagation direction [Optica 6, 1547, (2019)] and the optical phase circulates in space-time. Here, we experimentally and theoretically demonstrate, for the first time, the generation of the second harmonic of a STOV-carrying pulse along with the conservation of STOV-based OAM. Our experiments verify that individual photons can have intrinsic orbital angular momentum perpendicular to their propagation direction.
Keywords
Cite
@article{arxiv.2012.10806,
title = {Second harmonic generation of spatiotemporal optical vortices and conservation of orbital angular momentum},
author = {S. W. Hancock and S. Zahedpour and H. M. Milchberg},
journal= {arXiv preprint arXiv:2012.10806},
year = {2021}
}