Enhanced photoluminescence from plasmonic apparatus with two resonant cavity wavelengths

摘要

Embodiments include a gain system and method. The system includes a gain medium with a plurality of plasmonic apparatus. Each plasmonic apparatus includes a substrate having a first plasmonic surface, a plasmonic nanoparticle having a second plasmonic surface, and a dielectric-filled gap between the first plasmonic surface and the second plasmonic surface. A plasmonic cavity is created by an assembly of the first plasmonic surface, the second plasmonic surface, and the dielectric-filled gap, and has a first fundamental wavelength λ₁ and second fundamental wavelength λ₂. Fluorescent particles are located in the dielectric-filled gap. Each fluorescent particle has an absorption spectrum at the first fundamental wavelength λ₁ and an emission spectrum at the second fundamental wavelength λ₂. An excitation applied to the gain medium at the first fundamental wavelength λ₁ produces an amplified electromagnetic wave emission at the second resonant wavelength λ₂.