Liquid Crystalline Systems As Sources of Electrically Tunable White Laser Light (conference Presentation)

White lasers are becoming increasingly relevant in various fields since they exhibit unprecedented properties in terms of beam brightness and intensity modulation. Here we show that in hybrid materials based on modified and/or dye-doped liquid crystals, white laser light can be effectively generated upon optical pumping. We demonstrate a multicolor stimulated emission phenomenon obtained in dye-doped, liquid crystalline systems or in a multifunctional phase-separation system based on polymer matrix encompassing liquid crystals and multiple organic chromophores, where the precise color adjustment can be provided by applying the external electric DC fields or pumping energy density. The use of liquid crystalline materials for laser light generation can bring several advantages, like better photostability comparing to polymeric lasers, easy tunability of emitted light, e.g., by applied of the electric field, low cost of fabrication, and multitude of randomly or precisely generated photonic structures, which can be controlled by the external fields.