Abstract
We have studied how the random lasing can be enhanced by adding gold nanoparticles to dye-doped liquid crystals. The localized surface plasmons (LSPs) can strongly scatter light of a specific wavelength, and generate intense near-field light in the vicinity of particle surfaces. The addition of metal nanoparticles to the dye-dope liquid crystals leads to larger scattering cross-section than that of dielectric nanoparticles and enhance the fluorescence of the dye resulting from the LSP resonance. In this study, we prepared several kinds of gold nanoparticles with different diameters to examine the LSP resonance characteristics by the size of the particles.
