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Optical vortex generation in nematic liquid crystal light valves

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Optical vortex generation in nematic liquid crystal light valves. / Barboza, R.; Bortolozzo, U.; Assanto, G.; Residori, S.

In: Molecular Crystals and Liquid Crystals, Vol. 572, No. 1, 01.03.2013, p. 24-30.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Barboza, R, Bortolozzo, U, Assanto, G & Residori, S 2013, 'Optical vortex generation in nematic liquid crystal light valves', Molecular Crystals and Liquid Crystals, vol. 572, no. 1, pp. 24-30. https://doi.org/10.1080/15421406.2012.763206

APA

Barboza, R., Bortolozzo, U., Assanto, G., & Residori, S. (2013). Optical vortex generation in nematic liquid crystal light valves. Molecular Crystals and Liquid Crystals, 572(1), 24-30. https://doi.org/10.1080/15421406.2012.763206

Vancouver

Barboza R, Bortolozzo U, Assanto G, Residori S. Optical vortex generation in nematic liquid crystal light valves. Molecular Crystals and Liquid Crystals. 2013 Mar 1;572(1):24-30. https://doi.org/10.1080/15421406.2012.763206

Author

Barboza, R. ; Bortolozzo, U. ; Assanto, G. ; Residori, S. / Optical vortex generation in nematic liquid crystal light valves. In: Molecular Crystals and Liquid Crystals. 2013 ; Vol. 572, No. 1. pp. 24-30.

Bibtex - Download

@article{fbacf368bceb45c6b51a1e25c8395f27,
title = "Optical vortex generation in nematic liquid crystal light valves",
abstract = "A nematic liquid crystal light valve (LCLV) is made by using a photosensitive material as one of the cell-confining walls. The liquid crystals (LCs) are homeotropically aligned and with a negative anisotropy; therefore, they naturally produce topological defects when they reorient under the application of an electric field. In our work, we show that by sending circularly polarized light beams onto the photosensitive wall of the light valve, it is possible to locally induce the reorientation and to generate vortex-like defects that remain, each stable and trapped at the chosen location. We demonstrate the ability of the system to create optical vortices with opposite topological charge that, consistently with angular momentum conservation, both derive from the same defect created in the LC texture.The efficiency of the spin-to-orbital angular momentum conversion is measured as a function of the system control parameters, namely the low-frequency electric field applied to the light valve and the intensity of the optical beam inducing the matter defect.",
keywords = "Liquid crystal light valves, optical vortices, spin-to-orbital angular momentum conversion, topological defects",
author = "R. Barboza and U. Bortolozzo and G. Assanto and S. Residori",
year = "2013",
month = "3",
day = "1",
doi = "10.1080/15421406.2012.763206",
language = "English",
volume = "572",
pages = "24--30",
journal = "Molecular Crystals and Liquid Crystals",
issn = "1542-1406",
publisher = "Taylor & Francis",
number = "1",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Optical vortex generation in nematic liquid crystal light valves

AU - Barboza, R.

AU - Bortolozzo, U.

AU - Assanto, G.

AU - Residori, S.

PY - 2013/3/1

Y1 - 2013/3/1

N2 - A nematic liquid crystal light valve (LCLV) is made by using a photosensitive material as one of the cell-confining walls. The liquid crystals (LCs) are homeotropically aligned and with a negative anisotropy; therefore, they naturally produce topological defects when they reorient under the application of an electric field. In our work, we show that by sending circularly polarized light beams onto the photosensitive wall of the light valve, it is possible to locally induce the reorientation and to generate vortex-like defects that remain, each stable and trapped at the chosen location. We demonstrate the ability of the system to create optical vortices with opposite topological charge that, consistently with angular momentum conservation, both derive from the same defect created in the LC texture.The efficiency of the spin-to-orbital angular momentum conversion is measured as a function of the system control parameters, namely the low-frequency electric field applied to the light valve and the intensity of the optical beam inducing the matter defect.

AB - A nematic liquid crystal light valve (LCLV) is made by using a photosensitive material as one of the cell-confining walls. The liquid crystals (LCs) are homeotropically aligned and with a negative anisotropy; therefore, they naturally produce topological defects when they reorient under the application of an electric field. In our work, we show that by sending circularly polarized light beams onto the photosensitive wall of the light valve, it is possible to locally induce the reorientation and to generate vortex-like defects that remain, each stable and trapped at the chosen location. We demonstrate the ability of the system to create optical vortices with opposite topological charge that, consistently with angular momentum conservation, both derive from the same defect created in the LC texture.The efficiency of the spin-to-orbital angular momentum conversion is measured as a function of the system control parameters, namely the low-frequency electric field applied to the light valve and the intensity of the optical beam inducing the matter defect.

KW - Liquid crystal light valves

KW - optical vortices

KW - spin-to-orbital angular momentum conversion

KW - topological defects

UR - http://www.scopus.com/inward/record.url?scp=84876183883&partnerID=8YFLogxK

U2 - 10.1080/15421406.2012.763206

DO - 10.1080/15421406.2012.763206

M3 - Article

VL - 572

SP - 24

EP - 30

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

SN - 1542-1406

IS - 1

ER -