Qualitative chirality effects on the Casimir-Lifshitz torque with liquid crystals
We model a cholesteric liquid crystal as a planar uniaxial multilayer system, where the orientation of each layer differs slightly from that of the adjacent one. This allows us to analytically simplify the otherwise acutely complicated calculation of the Casimir-Lifshitz torque. Numerical results...
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sg-ntu-dr.10356-1607072023-02-28T20:07:02Z Qualitative chirality effects on the Casimir-Lifshitz torque with liquid crystals Broer, Wijnand Lu, Bing-Sui Podgornik, Rudolf School of Physical and Mathematical Sciences Science::Physics Angular Dependence Birefringent Crystals We model a cholesteric liquid crystal as a planar uniaxial multilayer system, where the orientation of each layer differs slightly from that of the adjacent one. This allows us to analytically simplify the otherwise acutely complicated calculation of the Casimir-Lifshitz torque. Numerical results differ appreciably from the case of nematic liquid crystals, which can be treated like bloc birefringent media. In particular, we find that the torque deviates considerably from its usual sinusoidal behavior as a function of the misalignment angle. In the case of a birefringent crystal faced with a cholesteric liquid one, the Casimir-Lifshitz torque decreases more slowly as a function of distance than in the nematic case. In the case of two cholesteric liquid crystals, either in the homochiral or in the heterochiral configuration, the angular dependence changes qualitatively as a function of distance. In all considered cases, finite pitch length effects are most pronounced at distances of about 10 nm. Ministry of Education (MOE) Published version We acknowledge funding from the Key Project No. 12034019 of the National Natural Science Foundation of China (WB and RP) and the Singapore Ministry of Education Academic Research Fund Tier 1 Grant No. RG160/19(S) (B-SL). 2022-08-01T06:03:01Z 2022-08-01T06:03:01Z 2021 Journal Article Broer, W., Lu, B. & Podgornik, R. (2021). Qualitative chirality effects on the Casimir-Lifshitz torque with liquid crystals. Physical Review Research, 3(3), 033238-1-033238-13. https://dx.doi.org/10.1103/PhysRevResearch.3.033238 2643-1564 https://hdl.handle.net/10356/160707 10.1103/PhysRevResearch.3.033238 2-s2.0-85115888598 3 3 033238-1 033238-13 en RG160/19(S) Physical Review Research © 2021 The Authors. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. application/pdf |
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Science::Physics Angular Dependence Birefringent Crystals Broer, Wijnand Lu, Bing-Sui Podgornik, Rudolf Qualitative chirality effects on the Casimir-Lifshitz torque with liquid crystals |
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We model a cholesteric liquid crystal as a planar uniaxial multilayer system,
where the orientation of each layer differs slightly from that of the adjacent
one. This allows us to analytically simplify the otherwise acutely complicated
calculation of the Casimir-Lifshitz torque. Numerical results differ
appreciably from the case of nematic liquid crystals, which can be treated like
bloc birefringent media. In particular, we find that the torque deviates
considerably from its usual sinusoidal behavior as a function of the
misalignment angle. In the case of a birefringent crystal faced with a
cholesteric liquid one, the Casimir-Lifshitz torque decreases more slowly as a
function of distance than in the nematic case. In the case of two cholesteric
liquid crystals, either in the homochiral or in the heterochiral configuration,
the angular dependence changes qualitatively as a function of distance. In all
considered cases, finite pitch length effects are most pronounced at distances
of about 10 nm. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Broer, Wijnand Lu, Bing-Sui Podgornik, Rudolf |
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Article |
author |
Broer, Wijnand Lu, Bing-Sui Podgornik, Rudolf |
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Broer, Wijnand |
title |
Qualitative chirality effects on the Casimir-Lifshitz torque with liquid crystals |
title_short |
Qualitative chirality effects on the Casimir-Lifshitz torque with liquid crystals |
title_full |
Qualitative chirality effects on the Casimir-Lifshitz torque with liquid crystals |
title_fullStr |
Qualitative chirality effects on the Casimir-Lifshitz torque with liquid crystals |
title_full_unstemmed |
Qualitative chirality effects on the Casimir-Lifshitz torque with liquid crystals |
title_sort |
qualitative chirality effects on the casimir-lifshitz torque with liquid crystals |
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2022 |
url |
https://hdl.handle.net/10356/160707 |
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1759857467083194368 |