Biphotonic recording effect of polarization gratings based on dye-doped liquid crystal films

Andy Ying Guey Fuh, Ko Ting Cheng, Chia-Rong Lee

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This study investigates a holographic recording effect of biphotonic polarization gratings (BPGs) written on dye-doped liquid crystal (DDLC) films. One linearly polarized green light (λG=514.5 nm) and a polarization-modulated interference pattern formed by two mutually coherent orthogonal (±45° with respect to the polarization of the green light) polarized red lights simultaneously excite the DDLC films to generate a BPG. The formation of BPGs depends primarily on the dichroism of the dye molecules and a sequence of mechanisms: photoisomerization, anisotropic adsorption and inhibition of dye adsorption. The cis-isomer absorbance-modulated distribution associated with the red polarization-modulation pattern induces the dye adsorption-modulated pattern, in turn, yielding the permanent BPG which generates a modulated twisted nematic (TN) structure pattern in the sample. It is found that each BPG is verified to be electrically switchable and thermally erasable. The switching time is in the order of milliseconds. Additionally, the recording time to form a BPG decreases with increasing intensity of the green pump beam.

Original languageEnglish
Pages (from-to)389-393
Number of pages5
JournalLiquid Crystals
Volume34
Issue number3
DOIs
Publication statusPublished - 2007 Mar 1

Fingerprint

Liquid Crystals
doped crystals
Liquid crystals
Coloring Agents
Dyes
dyes
recording
liquid crystals
gratings
Polarization
polarization
Methyl Green
adsorption
Adsorption
polarization modulation
Photoisomerization
Dichroism
Light polarization
polarized light
dichroism

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Fuh, Andy Ying Guey ; Cheng, Ko Ting ; Lee, Chia-Rong. / Biphotonic recording effect of polarization gratings based on dye-doped liquid crystal films. In: Liquid Crystals. 2007 ; Vol. 34, No. 3. pp. 389-393.
@article{6ffcc4f6302045dbb625f7514b5b1ccf,
title = "Biphotonic recording effect of polarization gratings based on dye-doped liquid crystal films",
abstract = "This study investigates a holographic recording effect of biphotonic polarization gratings (BPGs) written on dye-doped liquid crystal (DDLC) films. One linearly polarized green light (λG=514.5 nm) and a polarization-modulated interference pattern formed by two mutually coherent orthogonal (±45° with respect to the polarization of the green light) polarized red lights simultaneously excite the DDLC films to generate a BPG. The formation of BPGs depends primarily on the dichroism of the dye molecules and a sequence of mechanisms: photoisomerization, anisotropic adsorption and inhibition of dye adsorption. The cis-isomer absorbance-modulated distribution associated with the red polarization-modulation pattern induces the dye adsorption-modulated pattern, in turn, yielding the permanent BPG which generates a modulated twisted nematic (TN) structure pattern in the sample. It is found that each BPG is verified to be electrically switchable and thermally erasable. The switching time is in the order of milliseconds. Additionally, the recording time to form a BPG decreases with increasing intensity of the green pump beam.",
author = "Fuh, {Andy Ying Guey} and Cheng, {Ko Ting} and Chia-Rong Lee",
year = "2007",
month = "3",
day = "1",
doi = "10.1080/02678290601170925",
language = "English",
volume = "34",
pages = "389--393",
journal = "Liquid Crystals",
issn = "0267-8292",
publisher = "Taylor and Francis Ltd.",
number = "3",

}

Biphotonic recording effect of polarization gratings based on dye-doped liquid crystal films. / Fuh, Andy Ying Guey; Cheng, Ko Ting; Lee, Chia-Rong.

In: Liquid Crystals, Vol. 34, No. 3, 01.03.2007, p. 389-393.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Biphotonic recording effect of polarization gratings based on dye-doped liquid crystal films

AU - Fuh, Andy Ying Guey

AU - Cheng, Ko Ting

AU - Lee, Chia-Rong

PY - 2007/3/1

Y1 - 2007/3/1

N2 - This study investigates a holographic recording effect of biphotonic polarization gratings (BPGs) written on dye-doped liquid crystal (DDLC) films. One linearly polarized green light (λG=514.5 nm) and a polarization-modulated interference pattern formed by two mutually coherent orthogonal (±45° with respect to the polarization of the green light) polarized red lights simultaneously excite the DDLC films to generate a BPG. The formation of BPGs depends primarily on the dichroism of the dye molecules and a sequence of mechanisms: photoisomerization, anisotropic adsorption and inhibition of dye adsorption. The cis-isomer absorbance-modulated distribution associated with the red polarization-modulation pattern induces the dye adsorption-modulated pattern, in turn, yielding the permanent BPG which generates a modulated twisted nematic (TN) structure pattern in the sample. It is found that each BPG is verified to be electrically switchable and thermally erasable. The switching time is in the order of milliseconds. Additionally, the recording time to form a BPG decreases with increasing intensity of the green pump beam.

AB - This study investigates a holographic recording effect of biphotonic polarization gratings (BPGs) written on dye-doped liquid crystal (DDLC) films. One linearly polarized green light (λG=514.5 nm) and a polarization-modulated interference pattern formed by two mutually coherent orthogonal (±45° with respect to the polarization of the green light) polarized red lights simultaneously excite the DDLC films to generate a BPG. The formation of BPGs depends primarily on the dichroism of the dye molecules and a sequence of mechanisms: photoisomerization, anisotropic adsorption and inhibition of dye adsorption. The cis-isomer absorbance-modulated distribution associated with the red polarization-modulation pattern induces the dye adsorption-modulated pattern, in turn, yielding the permanent BPG which generates a modulated twisted nematic (TN) structure pattern in the sample. It is found that each BPG is verified to be electrically switchable and thermally erasable. The switching time is in the order of milliseconds. Additionally, the recording time to form a BPG decreases with increasing intensity of the green pump beam.

UR - http://www.scopus.com/inward/record.url?scp=34047104542&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34047104542&partnerID=8YFLogxK

U2 - 10.1080/02678290601170925

DO - 10.1080/02678290601170925

M3 - Article

VL - 34

SP - 389

EP - 393

JO - Liquid Crystals

JF - Liquid Crystals

SN - 0267-8292

IS - 3

ER -