Random Lasers: Multicolor Ultralow‐Threshold Random Laser Assisted by Vertical‐Graphene Network (Advanced Optical Materials 16/2018)

Abstract

Multicolor random lasing phenomena from a highly porous, nest‐like epitaxial graphene‐nanowalls geometry with different metal and semiconductor nanoparticles are demonstrated by Chi‐Te Liang, Yang‐Fang Chen and co‐workers (article number 1800382). The emitted photons from semiconductor nanoparticles suffer from multiple reflections at the vertically aligned porous graphene network, providing the optical feedback to the emission which produces a wide‐spectrum laser action.