Frequency Tunable Lasing in a Three Layer Cholesteric Liquid Crystal Cell

Novel combinations of liquid crystalline materials for liquid crystals lasers tuning are presented. The cell is based on a three layer system, with two cholesteric films sandwiching a third layer containing an isotropic mixture of a photoluminescent dye. One of the cholesteric films has a wide band...

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Bibliographic Details
Published in:Ferroelectrics 2010-01, Vol.395 (1), p.1-11
Main Authors: Matranga, M. A., De Santo, M. P., Petriashvili, G., Chanishvili, A., Chilaya, G., Barberi, R.
Format: Article
Language:English
Subjects:
Band spectra
Dyes
Esters
Lasers
Lasing
LCDs
Liquid crystal displays
Liquid crystals
liquid crystals devices
Photoluminescence
Spectral emissivity
Temperature
tunable laser
Tuning
Ultraviolet radiation
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Summary:Novel combinations of liquid crystalline materials for liquid crystals lasers tuning are presented. The cell is based on a three layer system, with two cholesteric films sandwiching a third layer containing an isotropic mixture of a photoluminescent dye. One of the cholesteric films has a wide band gap and the other one presents a narrow band gap, allowing the laser emission tuning over a wide spectral range, from UV to near IR. Further, using mixtures containing cholesteryl esters, a temperature control can be achieved.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150191003683963