Publication detail

Reflective Spin-Orbit Geometric Phase from Planar Isotropic Interface

BOUCHAL, P. BOUCHAL, Z.

Original Title

Reflective Spin-Orbit Geometric Phase from Planar Isotropic Interface

Type

journal article in Web of Science

Language

English

Original Abstract

Manipulating angular momentum of light relies on the change of geometric phase in anisotropic nanostructures or optical interface phenomena. Spin-orbit interactions demonstrated in normal incidence at a planar isotropic interface are conditioned by Brewster reflection, limited to the light beam with a single radial frequency in the k-space. This study demonstrates a geometric (Pancharatnam-Berry) phase that overcomes Brewster angle limitations providing high variability in the modulation of light reflected from a planar isotropic interface. The examined geometric phase stems from the reflection anisotropy imitating the structural anisotropy of photoaligned liquid crystals and photonic metasurfaces. Using a geometric-phase modulation of tightly focused light reflected from a glass slab, three modes of spin to orbital angular momentum conversion are demonstrated. The discovered reflective spin-orbit interaction allows for design of a double-helix focusing sensor to be used in microscopy imaging for precise depth measurements (accuracy 109 nm and precision 7 nm in the range of 8 & mu;m). Experiments with a focused astigmatic beam prove that a glass plate can perform very complex modulation of the geometric phase using illumination structuring. The results thus provide the foundation for the design of low-cost geometric-phase systems relying on the space-variant reflection anisotropy.

Keywords

geometric phase; optical vortices; orbital angular momentum; plasmonic metasurfaces; quantitative phase imaging; spin angular momentum; spin-orbit interaction

Authors

BOUCHAL, P.; BOUCHAL, Z.

Released

27. 6. 2023

Publisher

WILEY-V C H VERLAG GMBH

Location

WEINHEIM

ISBN

1863-8899

Periodical

Laser and Photonics Reviews

Year of study

17

Number

6

State

Federal Republic of Germany

Pages from

1

Pages to

11

Pages count

11

URL

https://onlinelibrary.wiley.com/doi/full/10.1002/lpor.202300018

BibTex

@article{BUT183879,
  author="Petr {Bouchal} and Zdeněk {Bouchal}",
  title="Reflective Spin-Orbit Geometric Phase from Planar Isotropic Interface",
  journal="Laser and Photonics Reviews",
  year="2023",
  volume="17",
  number="6",
  pages="1--11",
  doi="10.1002/lpor.202300018",
  issn="1863-8899",
  url="https://onlinelibrary.wiley.com/doi/full/10.1002/lpor.202300018"
}