Vitaliy N. Pustovit, Tigran V. Shahbazyan
We develop a microscopic theory for fluorescence of a molecule near a small metal nanoparticle. When a molecule is situated close to metal surface, its fluorescence is quenched due to energy transfer to the metal. We perform quantum-mechanical calculations of energy transfer rates for nanometer-sized Au nanoparticles and find that non-local and quantum-size effects significantly enhance dissipation in metal as compared to those predicted by semiclassical electromagnetic models. However, the dependence of energy transfer rates on molecule's distance to metal nanoparticle surface, $d$, is significantly weaker than the well known $d^{-4}$ behavior for flat metal surface with a sharp boundary calculated within random phase approximation.
View original:
http://arxiv.org/abs/1203.4656
No comments:
Post a Comment