title: Electrically controllable multicolor cholesteric laser.
abstract: A new strategy to obtain multicolor lasing from cholesteric liquid crystals is presented. A four layer cell is prepared with three different cholesteric layers and a layer containing a photoluminescent dye. The three cholesteric mixtures are prepared so that their photonic band gaps are partially overlapped. Through this combination, two laser lines are obtained in the same spot under the pumping beam irradiation. Eventually, one of the laser lines can be switched off if an electric field is applied to the first or the last cholesteric layer.
authors.forename: Lotfi
authors.initials: L
authors.lastname: Saadaoui
authors.forename: Gia
authors.initials: G
authors.lastname: Petriashvili
authors.forename: M P
authors.initials: MP
authors.lastname: De Santo
authors.forename: Ridha
authors.initials: R
authors.lastname: Hamdi
authors.forename: Tahar
authors.initials: T
authors.lastname: Othman
authors.forename: Riccardo
authors.initials: R
authors.lastname: Barberi