Detail publikace

Reflective Spin-Orbit Geometric Phase from Planar Isotropic Interface

BOUCHAL, P. BOUCHAL, Z.

Originální název

Reflective Spin-Orbit Geometric Phase from Planar Isotropic Interface

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

BOUCHAL, P.; BOUCHAL, Z.

Vydáno

27. 6. 2023

Nakladatel

WILEY-V C H VERLAG GMBH

Místo

WEINHEIM

ISSN

1863-8899

Periodikum

Laser and Photonics Reviews

Ročník

17

Číslo

6

Stát

Spolková republika Německo

Strany od

1

Strany do

11

Strany počet

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"
}