Affiliation:
1. Colgate University
2. Tecnologico de Monterrey
Abstract
In this work, we propose and demonstrate experimentally a new family of
vector beams, the helico-conical vector beams (HCVBs), whose spatial
degree of freedom is encoded in the helico-conical optical beams. We
use Stokes polarimetry to study their properties and find that upon
propagation their transverse polarization distribution evolves from
nonhomogeneous to quasihomogeneous, such that even though their global
degree of nonseparability remains constant, locally it decreases to a
minimum value as z → ∞. We corroborated
this quantitatively using the Hellinger distance, a novel metric for
vectorness that applies to spatially disjoint vector modes. To the
best of our knowledge, HCVBs are the second family of vector beams
featuring this behavior, paving the way for applications in optical
tweezing or information encryption.
Subject
Atomic and Molecular Physics, and Optics
Cited by
2 articles.
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