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Spaser: Plasmon Amplification by Stimulated Emission

Interactive spaser (surface plasmon amplification by stimulated emission of radiation) simulator: pump a dye-molecule gain shell around a gold nanoparticle core, watch population inversion build and the localized plasmon field cross threshold into coherent amplification.

Materials Science3DAdvanced60 FPS📱 Mobile-adapted⇄ 2D version

A spaser is a nanoscale amplifier: a gold nanoparticle core acts as a resonant cavity for a localized surface plasmon, surrounded by a shell of optically-pumped gain molecules. This simulator integrates the coupled rate equations for molecular population inversion and plasmon field occupation in real time — drive the pump rate up, and watch the gain shell (blue-to-orange dye molecules) build inversion, individual molecules fire stimulated-emission flashes toward the core, and the plasmon field snap from spontaneous noise into a bright, self-sustaining amplified glow once gain overtakes loss at the threshold pump rate.

⚙ Under the hood

Simulate a spaser -- a gold nanoparticle core surrounded by a pumped dye-molecule gain shell -- and watch population inversion and the localized plasmon field cross threshold into coherent nanoscale amplification.

spaserplasmonicsnanophotonicsgain-mediumstimulated-emissionnanoparticle

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install