Photoinduced two-dimensional gratings based on dye-doped cholesteric liquid crystal films

Hui Chen Yeh; Guang Hao Chen; Chia Rong Lee; Ting Shan Mo

doi:10.1063/1.2798103

Photoinduced two-dimensional gratings based on dye-doped cholesteric liquid crystal films

Hui Chen Yeh, Guang Hao Chen, Chia Rong Lee, Ting Shan Mo

Department of Photonics

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

This work elucidates photoinduced two-dimensional (2D) gratings in dye-doped cholesteric liquid crystal films. The helical pitch is increased by green-beam-induced trans-cis isomerization and a concomitant thermal effect. Two-dimensional gratings appear when the green beam is turned off. Grating formation results from elastic instability caused by restored strain arising from helical pitch reduction. Grating lifetime increases as green beam intensity increases and declines under irradiation with a strong red beam. Variation in grating spacing with green intensity with various pitches is also examined.

Original language	English
Article number	141105
Journal	Journal of Chemical Physics
Volume	127
Issue number	14
DOIs	https://doi.org/10.1063/1.2798103
Publication status	Published - 2007 Oct 18

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1063/1.2798103

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abstract = "This work elucidates photoinduced two-dimensional (2D) gratings in dye-doped cholesteric liquid crystal films. The helical pitch is increased by green-beam-induced trans-cis isomerization and a concomitant thermal effect. Two-dimensional gratings appear when the green beam is turned off. Grating formation results from elastic instability caused by restored strain arising from helical pitch reduction. Grating lifetime increases as green beam intensity increases and declines under irradiation with a strong red beam. Variation in grating spacing with green intensity with various pitches is also examined.",

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AU - Yeh, Hui Chen

AU - Chen, Guang Hao

AU - Lee, Chia Rong

AU - Mo, Ting Shan

PY - 2007/10/18

Y1 - 2007/10/18

N2 - This work elucidates photoinduced two-dimensional (2D) gratings in dye-doped cholesteric liquid crystal films. The helical pitch is increased by green-beam-induced trans-cis isomerization and a concomitant thermal effect. Two-dimensional gratings appear when the green beam is turned off. Grating formation results from elastic instability caused by restored strain arising from helical pitch reduction. Grating lifetime increases as green beam intensity increases and declines under irradiation with a strong red beam. Variation in grating spacing with green intensity with various pitches is also examined.

AB - This work elucidates photoinduced two-dimensional (2D) gratings in dye-doped cholesteric liquid crystal films. The helical pitch is increased by green-beam-induced trans-cis isomerization and a concomitant thermal effect. Two-dimensional gratings appear when the green beam is turned off. Grating formation results from elastic instability caused by restored strain arising from helical pitch reduction. Grating lifetime increases as green beam intensity increases and declines under irradiation with a strong red beam. Variation in grating spacing with green intensity with various pitches is also examined.

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Photoinduced two-dimensional gratings based on dye-doped cholesteric liquid crystal films

Abstract

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