Open AccessWaveguide random laser based on a disordered ZnSe-nanosheets arrangement
Author(s) -
Yi Jiang,
Yingjie Yu,
Jianli Shang,
Xiangchao An,
Bo Tu,
Guoying Feng,
Shouhuan Zhou
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.005102
Subject(s) - random laser , laser , materials science , waveguide , optics , scattering , optoelectronics , nanosheet , laser power scaling , coating , physics , lasing threshold , nanotechnology
A waveguide scheme is constructed by coating the matrix of randomly distributed ZnSe nanosheet structures with a layer of dye-doped polymer, which provides strong feedback or gain channels for the emission from the dye molecules and enables successful running of a random laser with FWHM of ~0.65 nm. The strong scattering by the nanostructures and the strong confinement provided by the active waveguide layer are the key essentials for the narrow-band and low-threshold operation of this random laser. The random laser scheme reveals an obvious two-threshold behavior, which is corresponding to the thresholds of TM and TE modes. The feedback mechanisms for laser action are investigated by power Fourier transforming of the spectra. This kind of active waveguide not only provides high quality confinement of the radiation for efficient amplification, but also enables possible directional output of this kind of random laser.