Observation of Interaction of Spin and Intrinsic Orbital Angular Momentum of Light

Abstract

Interaction of spin and intrinsic orbital angular momentum of light is observed, as evidenced by length-dependent rotations of both spatial patterns and optical polarization in a cylindrically-symmetric isotropic optical fiber. Such rotations occur in straight few-mode fiber when superpositions of two modes with parallel and anti-parallel orientation of spin and intrinsic orbital angular momentum (IOAM=$2\hslash$) are excited, resulting from a degeneracy splitting of the propagation constants of the modes.

arXiv comment6 pages, 5 figures, and a detailed supplement. Version 3 corrects a typo and adds the journal reference

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