Tunable Optical Vortices Generated by Self-Assembled Defect Structures in Nematics

Péter Salamon, Nándor Éber, Yuji Sasaki, Hiroshi Orihara, A. Buka, Fumito Araoka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A stable lattice of topological defects occurring at the electric reorientation of a nematic fluid is studied by quantitative polarimetry and laser diffraction. Generation of optical vortices by topological defects is demonstrated in the case of two distinct mechanisms. First, individual defects convert circularly polarized light partially into a vortex beam with opposite handedness, while beams diffracted on the defect lattice do not carry vorticity. Second, dislocation of the lattice structure is a topological defect on a larger length scale; then beams diffracted on a single dislocation possess optical vortex character. The vortex-generation efficiency is tunable by the applied voltage.

Original languageEnglish
Article number044008
JournalPhysical Review Applied
Volume10
Issue number4
DOIs
Publication statusPublished - Oct 3 2018

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vortices
defects
vortex generators
handedness
polarimetry
vorticity
polarized light
retraining
fluids
electric potential
diffraction
lasers

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Tunable Optical Vortices Generated by Self-Assembled Defect Structures in Nematics. / Salamon, Péter; Éber, Nándor; Sasaki, Yuji; Orihara, Hiroshi; Buka, A.; Araoka, Fumito.

In: Physical Review Applied, Vol. 10, No. 4, 044008, 03.10.2018.

Research output: Contribution to journalArticle

Salamon, Péter ; Éber, Nándor ; Sasaki, Yuji ; Orihara, Hiroshi ; Buka, A. ; Araoka, Fumito. / Tunable Optical Vortices Generated by Self-Assembled Defect Structures in Nematics. In: Physical Review Applied. 2018 ; Vol. 10, No. 4.
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