TITLE

Phototunable lasing in dye-doped cholesteric liquid crystals

AUTHOR(S)
Chanishvili, Andro; Chilaya, Guram; Petrishvili, Gia; Barberi, Riccardo; Bartolino, Roberto; Cipparrone, Gabriella; Mazzulla, Alfredo; Oriol, Luis
PUB. DATE
December 2003
SOURCE
Applied Physics Letters;12/29/2003, Vol. 83 Issue 26, p5353
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this letter, we report the results of phototunable lasing in dye-doped cholesteric liquid crystals (DD–CLC). Photoexcitation of DD–CLC films gives rise to laser emission in the violet-UV range. Control of the structure of the chiral dopant driven by UV phototransformation is exploited in order to obtain a permanent variation of the cholesteric pitch. Laser emission wavelength tuning, by means of photoinduced shifting of the selective reflection band of the cholesteric liquid crystals is established. A tuning interval of about 35 nm, in the wavelength range of 385–415 nm, is observed. © 2003 American Institute of Physics.
ACCESSION #
11753308

 

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