ABSTRACT

A waveguide-plasmonic scheme is constructed by coating the matrix of randomly
distributed gold nano-island 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. Excellent overlap of the plasmonic
resonance of the gold nanoislands with the photoluminescence spectrum of the dye
molecules and the strong confinement mechanism provided by the active waveguide
layer are the key essentials for the narrow-band and low-threshold operation of this
random laser. This kind of feedback configuration potentially enables directional
output from such random lasers. The flexible solution-processible fabrication of the
plasmonic gold nanostructures not only enables easy realization of such a random
laser, but also provides mechanisms for the tuning  and multi-color operation of the
laser emission.

全文链接：http://pubs.acs.org/toc/nalefd/current

nl2023096.pdf