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Effective medium analysis for optical control of laser tuning in a mixture of azo-nematics and cholesteric liquid crystal

Title
Effective medium analysis for optical control of laser tuning in a mixture of azo-nematics and cholesteric liquid crystal
Authors
Kang B.Choi H.Jeong M.-Y.Wu J.W.
Ewha Authors
우정원
SCOPUS Author ID
우정원scopus
Issue Date
2010
Journal Title
Journal of the Optical Society of America B: Optical Physics
ISSN
0740-3224JCR Link
Citation
vol. 27, no. 2, pp. 204 - 207
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The selective reflection band structure of a mixture composed of azo-nematics and cholesteric liquid crystal (azo-based CLC) is investigated as an effective single optical medium. Berreman's 4×4 matrix method is adopted to analyze the photoisomerization-induced changes in the azo-based CLC by identifying the effective refractive indices as well as the helical pitch. In a laser dye-doped azo-based CLC, a stable reversible tuning of laser wavelengths at each domain of the two-dimensional laser array is demonstrated. © 2010 Optical Society of America.
DOI
10.1364/JOSAB.27.000204
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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