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 language | English |
|---|---|
| Pages (from-to) | 26837-26844 |
| Number of pages | 8 |
| Journal | Optics Express |
| Volume | 20 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 2012 Nov 19 |
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
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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 journal › Article
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 -