Photonic orbital angular momentum with controllable orientation

Abstract

Vortices are whirling disturbances commonly found in nature ranging from tremendously small scales in Bose-Einstein condensates to cosmologically colossal scales in spiral galaxies. An optical vortex, generally associated with a spiral phase, can carry orbital angular momentum (OAM). The optical OAM can either be in the longitudinal direction if the spiral phase twists in the spatial domain or in the transverse direction if the phase rotates in the spatiotemporal domain. In this article, we demonstrate the intersection of spatiotemporal vortices and spatial vortices in a wave packet. As a result of this intersection, the wave packet hosts a tilted OAM that provides an additional degree of freedom to the applications that harness the OAM of photons.

References in corpus (6)

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Cited by in corpus (8)

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• Topologically protected generation of spatiotemporal optical vortices with nonlocal spatial-mirror-symmetry-breaking metasurface
• Toward arbitrary spin-orbit flat optics via structured geometric phase gratings
• Advances in laser-plasma interactions using intense vortex laser beams
• Towards optical toroidal wavepacket through tightly focusing of cylindrical vector two dimensional spatiotemporal optical vortex
• Transverse Shifts and Time Delays of Spatiotemporal Vortex Pulses Reflected and Refracted at a Planar Interface