title: Wide band gap materials as a new tuning strategy for dye doped cholesteric liquid crystals laser.
abstract: 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.
authors.affiliation: Institute of Cybernetics, Euli str. 5, 0186, Tbilisi, Georgia.
authors.forename: G
authors.initials: G
authors.lastname: Petriashvili
authors.forename: M A
authors.initials: MA
authors.lastname: Matranga
authors.forename: M P
authors.initials: MP
authors.lastname: De Santo
authors.forename: G
authors.initials: G
authors.lastname: Chilaya
authors.forename: R
authors.initials: R
authors.lastname: Barberi