Open AccessWide band gap materials as a new tuning strategy for dye doped cholesteric liquid crystals laser
Author(s) -
Gia Petriashvili,
M. A. Matranga,
Maria P. De Santo,
G. S. Chilaya,
R. Barberi
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.004553
Subject(s) - materials science , optics , laser , doping , wavelength , liquid crystal , optoelectronics , layer (electronics) , band gap , dye laser , isotropy , nanotechnology , physics
A new tuning strategy for mirror-less liquid crystals laser is presented. A three layer cell is prepared with two cholesteric layers sandwiching a layer containing an isotropic mixture of a photoluminescent dye. One of the chiral layers contains a wide band gap material while the second layer consists of a series of small band gap materials. Through the combination of these two layers, a set of mirrors that can selectively reflect different wavelengths is obtained. A different laser wavelength is emitted from different regions of the cell under the pumping beam irradiation.