Non-integer OAM beam shifts of Hermite-Laguerre-Gaussian beams

TL;DR

This paper investigates how non-integer orbital angular momentum affects beam shifts in Hermite-Laguerre-Gaussian beams, revealing non-linear behavior contrary to initial expectations through both theoretical analysis and experiments.

Contribution

It provides the first detailed study of non-integer OAM effects on beam shifts, showing non-linear relationships and expanding understanding of OAM beam dynamics.

Findings

Non-integer OAM beam shifts do not interpolate linearly from integer OAM shifts.

Both theoretical and experimental results confirm non-linear behavior.

The study enhances understanding of OAM beam interactions and shifts.

Abstract

We have studied the effect of non-integer Orbital Angular Momentum (OAM) on OAM enhanced beam shifts, for in-plane (Goos-Hanchen) and out-of-plane (Imbert-Fedorov) shifts, using Hermite-Laguerre-Gaussian beams. Contrary to naive expectation we find, theoretically and experimentally, that the noninteger OAM beam shifts do not interpolate linearly between the integer OAM beam shifts.