Rotatable diffractive gratings based on hybrid-aligned cholesteric liquid crystals

Chi Huang Lin, Ru Hsien Chiang, Shu Hao Liu, Chie Tong Kuo, Chi Yen Huang

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

This work proposes a thermally rotatable grating that is based on hybrid-aligned cholesteric liquid crystals (HBA-cholesteric LCs). Experiments reveal that the HBA-cholesteric texture has a uniformly striped domain, which forms a grating, when the ratio of the cell gap to the helical pitch (d/p) is in the range of 2≤d/p≤3. The stripe direction of the HBA-cholesteric grating is predicted by the proposed vertically aligned LC layer model. The stripe direction of the HBA-cholesteric grating rotates continuously under thermal and electrical effects. Furthermore, the HBA-cholesteric grating has a larger rotational angle under the thermal effect (∼101°) than under the electrical effect (∼48°). Potential applications of the proposed thermally rotatable cholesteric grating for beam steering devices are emphasized.

Original languageEnglish
Pages (from-to)26837-26844
Number of pages8
JournalOptics Express
Volume20
Issue number24
DOIs
Publication statusPublished - 2012 Nov 19

Fingerprint

liquid crystals
gratings
temperature effects
beam steering
textures
cells

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Lin, Chi Huang ; Chiang, Ru Hsien ; Liu, Shu Hao ; Kuo, Chie Tong ; Huang, Chi Yen. / Rotatable diffractive gratings based on hybrid-aligned cholesteric liquid crystals. In: Optics Express. 2012 ; Vol. 20, No. 24. pp. 26837-26844.
@article{41bc791112c04d7fa313a2439299d8e2,
title = "Rotatable diffractive gratings based on hybrid-aligned cholesteric liquid crystals",
abstract = "This work proposes a thermally rotatable grating that is based on hybrid-aligned cholesteric liquid crystals (HBA-cholesteric LCs). Experiments reveal that the HBA-cholesteric texture has a uniformly striped domain, which forms a grating, when the ratio of the cell gap to the helical pitch (d/p) is in the range of 2≤d/p≤3. The stripe direction of the HBA-cholesteric grating is predicted by the proposed vertically aligned LC layer model. The stripe direction of the HBA-cholesteric grating rotates continuously under thermal and electrical effects. Furthermore, the HBA-cholesteric grating has a larger rotational angle under the thermal effect (∼101°) than under the electrical effect (∼48°). Potential applications of the proposed thermally rotatable cholesteric grating for beam steering devices are emphasized.",
author = "Lin, {Chi Huang} and Chiang, {Ru Hsien} and Liu, {Shu Hao} and Kuo, {Chie Tong} and Huang, {Chi Yen}",
year = "2012",
month = "11",
day = "19",
doi = "10.1364/OE.20.026837",
language = "English",
volume = "20",
pages = "26837--26844",
journal = "Optics Express",
issn = "1094-4087",
publisher = "The Optical Society",
number = "24",

}

Rotatable diffractive gratings based on hybrid-aligned cholesteric liquid crystals. / Lin, Chi Huang; Chiang, Ru Hsien; Liu, Shu Hao; Kuo, Chie Tong; Huang, Chi Yen.

In: Optics Express, Vol. 20, No. 24, 19.11.2012, p. 26837-26844.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Rotatable diffractive gratings based on hybrid-aligned cholesteric liquid crystals

AU - Lin, Chi Huang

AU - Chiang, Ru Hsien

AU - Liu, Shu Hao

AU - Kuo, Chie Tong

AU - Huang, Chi Yen

PY - 2012/11/19

Y1 - 2012/11/19

N2 - This work proposes a thermally rotatable grating that is based on hybrid-aligned cholesteric liquid crystals (HBA-cholesteric LCs). Experiments reveal that the HBA-cholesteric texture has a uniformly striped domain, which forms a grating, when the ratio of the cell gap to the helical pitch (d/p) is in the range of 2≤d/p≤3. The stripe direction of the HBA-cholesteric grating is predicted by the proposed vertically aligned LC layer model. The stripe direction of the HBA-cholesteric grating rotates continuously under thermal and electrical effects. Furthermore, the HBA-cholesteric grating has a larger rotational angle under the thermal effect (∼101°) than under the electrical effect (∼48°). Potential applications of the proposed thermally rotatable cholesteric grating for beam steering devices are emphasized.

AB - This work proposes a thermally rotatable grating that is based on hybrid-aligned cholesteric liquid crystals (HBA-cholesteric LCs). Experiments reveal that the HBA-cholesteric texture has a uniformly striped domain, which forms a grating, when the ratio of the cell gap to the helical pitch (d/p) is in the range of 2≤d/p≤3. The stripe direction of the HBA-cholesteric grating is predicted by the proposed vertically aligned LC layer model. The stripe direction of the HBA-cholesteric grating rotates continuously under thermal and electrical effects. Furthermore, the HBA-cholesteric grating has a larger rotational angle under the thermal effect (∼101°) than under the electrical effect (∼48°). Potential applications of the proposed thermally rotatable cholesteric grating for beam steering devices are emphasized.

UR - http://www.scopus.com/inward/record.url?scp=84870610546&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84870610546&partnerID=8YFLogxK

U2 - 10.1364/OE.20.026837

DO - 10.1364/OE.20.026837

M3 - Article

C2 - 23187537

AN - SCOPUS:84870610546

VL - 20

SP - 26837

EP - 26844

JO - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 24

ER -