A novel geometric phase for optical beams

TL;DR

This paper introduces a new type of geometric phase observed in optical beams interacting with nanostructures, expanding the understanding of phase phenomena beyond traditional structured-light optics.

Contribution

It presents a novel geometric phase for optical beams arising from interactions with nanostructures, differing from conventional phases in structured-light optics.

Findings

Identification of a new geometric phase in optical beam interactions

Comparison showing differences from traditional geometric phases

Potential implications for optical system design

Abstract

In this paper, we provide an accurate description of geometric phases emerging in simple optical systems -- nanostructures (metaatoms) interacting with vortex beams. We show that this interaction leads to a new class of geometric phase for optical beams, which is different from the geometric phases commonly discussed in structured-light optics. We compare this setting to the usual description of geometric phases for beams and show that the underlying geometry is different.