Broadband spontaneous emission rate enhancement through the design of plasmonic nanoantennas

作者：Vallee Renaud A L^*; Ferrie Melanie; Saadaoui Hassan; Ravaine Serge

来源：Optical Materials Express, 2012, 2(5): 566-577.

We numerically investigate and experimentally demonstrate a new route to controllably manipulate the spontaneous decay rate of dipole emitters in coupled plasmonic modes. The structure under investigation is an hexagonal close-packed array of gold core - silica shell nanoparticles (NPs) sandwiched between two gold films. We show that the interaction of localized and propagating surface plasmon polaritons can dramatically enhance the spontaneous emission rate of quantum emitters (rhodamine isothiocyanate) grafted in the NP silica shell. This strong enhancement (70 - 100 times) further occurs on the whole, broadband emission spectrum (565 nm to 640 nm) of the emitters.

• 出版日期2012-5-1