Fluorescence quenching in plasmonic dimers due to electron tunneling.

ABSTRACT: Plasmonic nanoparticles provide an ideal environment for the enhancement of fluorescent emission. On the one hand, they locally amplify the electromagnetic fields, increasing the emitter excitation rate, and on the other hand, they provide a high local density of states that accelerates spontaneous emission. However, when the emitter is placed in close proximity to a single metal nanoparticle, the number of nonradiative states increases dramatically, causing the fluorescence to quench. It has been predicted theoretically that, through a judicious placing of the emitter, fluorescence in plasmonic nanocavities can be increased monotonically. In this article, we show that such monotonic increase is due to the use of local response approximation in the description of the plasmonic response of

SUBMITTER: Baghramyan HM 

PROVIDER: S-EPMC11501688 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature