Second-harmonic generation of spatiotemporal optical vortices and conservation of orbital angular momentum

A spatiotemporal optical vortex (STOV) is an intrinsic optical orbital angular momentum (OAM) structure in which the OAM vector is orthogonal to the propagation direction [ Optica 6 , 1547 ( 2019 ) OPTIC8 2334-2536 10.1364/OPTICA.6.001547 ] and the optical phase circulates in space-time. Here, we ex...

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Bibliographic Details
Published inOptica Vol. 8; no. 5; p. 594
Main Authors Hancock, S. W., Zahedpour, S., Milchberg, H. M.
Format Journal Article
LanguageEnglish
Published 20.05.2021
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Summary:A spatiotemporal optical vortex (STOV) is an intrinsic optical orbital angular momentum (OAM) structure in which the OAM vector is orthogonal to the propagation direction [ Optica 6 , 1547 ( 2019 ) OPTIC8 2334-2536 10.1364/OPTICA.6.001547 ] and the optical phase circulates in space-time. Here, we experimentally and theoretically demonstrate the generation of the second harmonic of a STOV-carrying pulse along with the conservation of STOV-based OAM. Our experiments verify that photons can have intrinsic orbital angular momentum perpendicular to their propagation direction.
ISSN:2334-2536
2334-2536
DOI:10.1364/OPTICA.422743