Polarization-independent holographic gratings based on azo-dye-doped polymer-dispersedliquid-crystal films

Andy Ying Guey Fuh; Che Chang Chen; Ko Ting Cheng; Cheng Kai Liu; Wei Ko Chen

doi:10.1364/AO.49.000275

Polarization-independent holographic gratings based on azo-dye-doped polymer-dispersedliquid-crystal films

Andy Ying Guey Fuh, Che Chang Chen, Ko Ting Cheng, Cheng Kai Liu, Wei Ko Chen

Department of Optics and Photonics

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

4 Scopus citations

Abstract

We demonstrate polarization-independent holographic gratings (PIHGs) based on azo-dye-doped polymer-dispersed liquid crystal films. The PIHGs are recorded by irradiation under an intensity-modulated interference field, generated by two linearly polarized green optical beams, and by simultaneously applying a suitable AC voltage to the sample. The photoexcited azo dyes are adsorbed onto the UV-cured polymer film with their long axes parallel to the normal of the substrate. When the applied voltage is switched off, the PIHGs are generated with periodic modulation of liquid-crystal structures with transparently homeotropic and randomly scattered alignments. Additionally, the generated PIHGs can be completely switched off by an applied voltage.

Original language	English
Pages (from-to)	275-280
Number of pages	6
Journal	Applied Optics
Volume	49
Issue number	2
DOIs	https://doi.org/10.1364/AO.49.000275
State	Published - 10 Jan 2010

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abstract = "We demonstrate polarization-independent holographic gratings (PIHGs) based on azo-dye-doped polymer-dispersed liquid crystal films. The PIHGs are recorded by irradiation under an intensity-modulated interference field, generated by two linearly polarized green optical beams, and by simultaneously applying a suitable AC voltage to the sample. The photoexcited azo dyes are adsorbed onto the UV-cured polymer film with their long axes parallel to the normal of the substrate. When the applied voltage is switched off, the PIHGs are generated with periodic modulation of liquid-crystal structures with transparently homeotropic and randomly scattered alignments. Additionally, the generated PIHGs can be completely switched off by an applied voltage.",

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AU - Cheng, Ko Ting

AU - Liu, Cheng Kai

AU - Chen, Wei Ko

PY - 2010/1/10

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N2 - We demonstrate polarization-independent holographic gratings (PIHGs) based on azo-dye-doped polymer-dispersed liquid crystal films. The PIHGs are recorded by irradiation under an intensity-modulated interference field, generated by two linearly polarized green optical beams, and by simultaneously applying a suitable AC voltage to the sample. The photoexcited azo dyes are adsorbed onto the UV-cured polymer film with their long axes parallel to the normal of the substrate. When the applied voltage is switched off, the PIHGs are generated with periodic modulation of liquid-crystal structures with transparently homeotropic and randomly scattered alignments. Additionally, the generated PIHGs can be completely switched off by an applied voltage.

AB - We demonstrate polarization-independent holographic gratings (PIHGs) based on azo-dye-doped polymer-dispersed liquid crystal films. The PIHGs are recorded by irradiation under an intensity-modulated interference field, generated by two linearly polarized green optical beams, and by simultaneously applying a suitable AC voltage to the sample. The photoexcited azo dyes are adsorbed onto the UV-cured polymer film with their long axes parallel to the normal of the substrate. When the applied voltage is switched off, the PIHGs are generated with periodic modulation of liquid-crystal structures with transparently homeotropic and randomly scattered alignments. Additionally, the generated PIHGs can be completely switched off by an applied voltage.

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Polarization-independent holographic gratings based on azo-dye-doped polymer-dispersedliquid-crystal films

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