Open AccessElectrically controllable plasmonic enhanced coherent random lasing from dye-doped nematic liquid crystals containing Au nanoparticles
Author(s) -
Lei Wang,
Yuan Wan,
Lei Shi,
Haizheng Zhong,
Luogen Deng
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.017593
Subject(s) - liquid crystal , lasing threshold , materials science , optics , plasmon , polarization (electrochemistry) , electric field , plasmonic nanoparticles , random laser , optoelectronics , nanoparticle , dielectric , scattering , rubbing , nanotechnology , physics , wavelength , chemistry , quantum mechanics , composite material
An electrically controllable plasmonic enhanced coherent random lasing from the dye-doped nematic liquid crystal containing Au nanoparticles is demonstrated. To achieve the optimal control of the RL properties, the polarization of the pump light should be parallel to the rubbing direction of the cells. The lasing output intensity is direction-dependent and the substantial output distributes in an angle range of 0°~30° deviating from the direction of the pump stripe. The coherent feedback associated with the coherent random lasing mainly originates from the cooperative effect of the enhanced localized electric field in the vicinity of Au nanoparticles and the multiple scattering caused by the fluctuations of the liquid crystal director and local dielectric tensor.