Magnetically controllable random laser in ferromagnetic nematic liquid crystals

This paper first reports random laser action in dye-doped ferromagnetic nematic liquid crystals, which act as a randomly distributed cavity. The random laser intensity of the ferromagnetic nematic liquid crystals can be controlled by a weak magnetic field (similar to 1 mT). Moreover, the magnetic switching of random laser is attributed to the direction and polarization dependent emission of light in the ferromagnetic nematic liquid crystals in an external magnetic field. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement