Enhanced spontaneous down-conversion in plasmonic and quantum emitter hybrid structures

Abstract

Metallic nanoparticles provide extreme localization and enhancement of optical fields. The existence of quantum emitter in the vicinity~(hot spots) of these plasmonic particles introduces the weak hybridization in the excited state of plasmon and leads to create Fano resonances. Here we demonstrate that using such hybrid structures as the interaction centers in a nonlinear crystal, one can enhance generated down-converted fields. The results indicate that the intenstiy of down-converted field can be strengthened 6-orders of magnitude with reliable interaction strengths and by choosing the appropriate level spacing for the quantum emitter.Comment: 6 pages, 3 figure