Recent progress on photoluminescence from plasmonic nanostructures: Phenomenon, mechanism, and application

Yin Tingting^{2, 3}, Jiang Liyong^{1, 2, †}, Shen Zexiang^{2, 3, ‡}

(color online) (a) Schematic of two CTAB-coated (light blue) Au nanosphere dimers positioned on a thin Au film (yellow) and on the silica substrate (light gray) respectively. (b) Measured scattering spectra and PL spectra of the Au nanosphere dimmers (c) on the Au film and (d) on the silica substrate.^[49]