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Spatial tuning of laser emission in a dye-doped cholesteric liquid crystal wedge cell

Title
Spatial tuning of laser emission in a dye-doped cholesteric liquid crystal wedge cell
Authors
Jeong M.-Y.Choi H.Wu J.W.
Ewha Authors
우정원
SCOPUS Author ID
우정원scopus
Issue Date
2008
Journal Title
Applied Physics Letters
ISSN
0003-6951JCR Link
Citation
vol. 92, no. 5
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Spatial tuning of lasing wavelength in a dye-doped cholesteric liquid crystal wedge cell is demonstrated. The wedge cell possesses a series of dislocation lines along the wedge direction. In the lasing operation, we find that the lasing wavelength is continuously tuned in the region between two dislocation lines, while the lasing wavelength jumps when crossing the dislocation lines. The observed one-dimensional spatial continuous tuning is attributed to the presence of a gradient in the cholesteric helical pitch, while the laser wavelength jumping originates from the pitch jump owing to a change in the number of half-turns of the cholesteric helix. © 2008 American Institute of Physics.
DOI
10.1063/1.2841820
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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