Generation, propagation, and switching of orientational waves in photoexcited liquid-crystalline monolayers

Tohru Okuzono, Yuka Tabe, Hiroshi Yokoyama

Research output: Contribution to journalArticle

Abstract

Photoinduced orientational waves in illuminated liquid-crystalline monolayers is one of the most remarkable far-from-equilibrium phenomena that systems of soft condensed matter exhibit. We model this behavior from a phenomenological point of view, taking the anisotropic photoexcitation of molecules into account. Numerical simulations as well as theoretical analyses of the model reveal that the intricate interplay between the spontaneous splay deformation of the liquid-crystalline order and the anisotropy of the photoexcitation can lead to the generation and propagation of orientational waves. The model can explain all the salient features of the phenomenon—in particular, the anomalous reversal of the propagation direction upon [Formula presented] rotation of the polarization direction of illumination, which evaded theoretical explanation for nearly a decade.

Original languageEnglish
Number of pages1
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume69
Issue number5
DOIs
Publication statusPublished - 2004 Jan 1
Externally publishedYes

Fingerprint

Liquid
Propagation
photoexcitation
propagation
liquids
Reversal
Anomalous
Anisotropy
Illumination
Polarization
illumination
Molecules
Model
Numerical Simulation
anisotropy
polarization
molecules
simulation

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

Cite this

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abstract = "Photoinduced orientational waves in illuminated liquid-crystalline monolayers is one of the most remarkable far-from-equilibrium phenomena that systems of soft condensed matter exhibit. We model this behavior from a phenomenological point of view, taking the anisotropic photoexcitation of molecules into account. Numerical simulations as well as theoretical analyses of the model reveal that the intricate interplay between the spontaneous splay deformation of the liquid-crystalline order and the anisotropy of the photoexcitation can lead to the generation and propagation of orientational waves. The model can explain all the salient features of the phenomenon—in particular, the anomalous reversal of the propagation direction upon [Formula presented] rotation of the polarization direction of illumination, which evaded theoretical explanation for nearly a decade.",
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AB - Photoinduced orientational waves in illuminated liquid-crystalline monolayers is one of the most remarkable far-from-equilibrium phenomena that systems of soft condensed matter exhibit. We model this behavior from a phenomenological point of view, taking the anisotropic photoexcitation of molecules into account. Numerical simulations as well as theoretical analyses of the model reveal that the intricate interplay between the spontaneous splay deformation of the liquid-crystalline order and the anisotropy of the photoexcitation can lead to the generation and propagation of orientational waves. The model can explain all the salient features of the phenomenon—in particular, the anomalous reversal of the propagation direction upon [Formula presented] rotation of the polarization direction of illumination, which evaded theoretical explanation for nearly a decade.

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