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Controlling diffracted beam-polarization by patterned optical-field in a photosensitive chiral nematic.

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Title: Controlling diffracted beam-polarization by patterned optical-field in a photosensitive chiral nematic.
Authors: Liang, Fei1 (AUTHOR), Jing, Hongzhen1 (AUTHOR), Fu, Jiaming1 (AUTHOR), Xiang, Ying1 (AUTHOR) frank_xiang68@qq.com, Salamon, Péter1,2 (AUTHOR) salamon.peter@wigner.hun-ren.hu, Éber, Nándor2 (AUTHOR), Buka, Ágnes2 (AUTHOR), Kohout, Michal3 (AUTHOR), Li, Jiaoyang4 (AUTHOR), Chen, Jiawen5 (AUTHOR)
Source: Journal of Molecular Liquids. Feb2025, Vol. 420, pN.PAG-N.PAG. 1p.
Subjects: Cholesteric liquid crystals, Nematic liquid crystals, Optical polarization, Vector beams, Liquid crystals
Abstract: • In contrast to traditional polarization control techniques which are only applicable to the transmitted light, we can manipulate the polarization state of the diffracted beam. • Besides experiments, we also provide the theoretical basis of the patterned UV-light-induced director distortion and the expected diffraction characteristics. • Taking advantage of the adjustable self-assembling behaviour and stimuli-responsive reconfigurable morphology of liquid crystals, in situ operations can be performed dynamically. This technique may open new perspectives in photonic applications. • We pointed out that with an optimized combination of UV light intensity, the sign and the strength of chirality, a polarization field with specific spatial structures can be generated, as proven by two prototypes capable of generating customized vortex. Rotation of the light polarization of a diffracted beam, manipulated by imposed patterned UV optical field, is proposed and examined in a photosensitive chiral nematic liquid crystal. Such operations can be performed dynamically and reversibly, by varying the UV intensity. It was revealed that the rotations are ascribed to an optical-field-induced chirality effect, where the helical structure in chiral nematics changes periodically in space in accordance with the UV intensity profile. Using continuum elastic theory and the optical Jones matrix technique, we determined the dependence of polarization orientation on UV intensity. By changing the polarity and magnitude of chirality in chiral nematics, UV light can control the orientation of the polarization state sweeping across the entire horizontal plane, making it possible for polarization converter applications. Proof-of-concept prototypes capable of generating customized vortex and vector beams are demonstrated, proving that by virtue of remote and precise control of the optical field, a polarization field with specific spatial structures can be generated. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Molecular Liquids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 183034941
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Controlling diffracted beam-polarization by patterned optical-field in a photosensitive chiral nematic.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Liang%2C+Fei%22">Liang, Fei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jing%2C+Hongzhen%22">Jing, Hongzhen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fu%2C+Jiaming%22">Fu, Jiaming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiang%2C+Ying%22">Xiang, Ying</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> frank_xiang68@qq.com</i><br /><searchLink fieldCode="AR" term="%22Salamon%2C+Péter%22">Salamon, Péter</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> salamon.peter@wigner.hun-ren.hu</i><br /><searchLink fieldCode="AR" term="%22Éber%2C+Nándor%22">Éber, Nándor</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Buka%2C+Ágnes%22">Buka, Ágnes</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kohout%2C+Michal%22">Kohout, Michal</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Jiaoyang%22">Li, Jiaoyang</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Jiawen%22">Chen, Jiawen</searchLink><relatesTo>5</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Molecular+Liquids%22">Journal of Molecular Liquids</searchLink>. Feb2025, Vol. 420, pN.PAG-N.PAG. 1p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Cholesteric+liquid+crystals%22">Cholesteric liquid crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Nematic+liquid+crystals%22">Nematic liquid crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+polarization%22">Optical polarization</searchLink><br /><searchLink fieldCode="DE" term="%22Vector+beams%22">Vector beams</searchLink><br /><searchLink fieldCode="DE" term="%22Liquid+crystals%22">Liquid crystals</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • In contrast to traditional polarization control techniques which are only applicable to the transmitted light, we can manipulate the polarization state of the diffracted beam. • Besides experiments, we also provide the theoretical basis of the patterned UV-light-induced director distortion and the expected diffraction characteristics. • Taking advantage of the adjustable self-assembling behaviour and stimuli-responsive reconfigurable morphology of liquid crystals, in situ operations can be performed dynamically. This technique may open new perspectives in photonic applications. • We pointed out that with an optimized combination of UV light intensity, the sign and the strength of chirality, a polarization field with specific spatial structures can be generated, as proven by two prototypes capable of generating customized vortex. Rotation of the light polarization of a diffracted beam, manipulated by imposed patterned UV optical field, is proposed and examined in a photosensitive chiral nematic liquid crystal. Such operations can be performed dynamically and reversibly, by varying the UV intensity. It was revealed that the rotations are ascribed to an optical-field-induced chirality effect, where the helical structure in chiral nematics changes periodically in space in accordance with the UV intensity profile. Using continuum elastic theory and the optical Jones matrix technique, we determined the dependence of polarization orientation on UV intensity. By changing the polarity and magnitude of chirality in chiral nematics, UV light can control the orientation of the polarization state sweeping across the entire horizontal plane, making it possible for polarization converter applications. Proof-of-concept prototypes capable of generating customized vortex and vector beams are demonstrated, proving that by virtue of remote and precise control of the optical field, a polarization field with specific spatial structures can be generated. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Molecular Liquids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.molliq.2024.126814
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Cholesteric liquid crystals
        Type: general
      – SubjectFull: Nematic liquid crystals
        Type: general
      – SubjectFull: Optical polarization
        Type: general
      – SubjectFull: Vector beams
        Type: general
      – SubjectFull: Liquid crystals
        Type: general
    Titles:
      – TitleFull: Controlling diffracted beam-polarization by patterned optical-field in a photosensitive chiral nematic.
        Type: main
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            NameFull: Liang, Fei
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            NameFull: Jing, Hongzhen
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            NameFull: Fu, Jiaming
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            NameFull: Xiang, Ying
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            NameFull: Salamon, Péter
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            NameFull: Éber, Nándor
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            NameFull: Buka, Ágnes
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            NameFull: Kohout, Michal
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            NameFull: Li, Jiaoyang
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            NameFull: Chen, Jiawen
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          Dates:
            – D: 15
              M: 02
              Text: Feb2025
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-print
              Value: 01677322
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              Value: 420
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            – TitleFull: Journal of Molecular Liquids
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