Optical properties of new hybrid nanoantenna in submicron cavity

Abstract

An essential area of nanophotonics is the creation of efficient quantum emitters operating at high frequencies. In this regard, plasmon nanoantennas based on nanoparticles on metal (nanopatch antennas) are incredibly relevant. We have created and investigated a new hybrid nanoantenna with a cube on metal and quantum emitters. We demonstrate an increase up to 60 times for the rate of spontaneous emission and the gap-plasmon mode changing for nanopatch antenna in the metallic well. The results show the possibility of creating plasmon antennas in a controlled way by creating an array of regularly arranged nanoscale cavities-resonators.

Ultrabright photoluminescence spikes and step-wise photoluminescence increase from colloidal silver nanoparticles for patch nanoantennas

“…Room-temperature single (antibunched) photon sources (SPSs) based on single-emitter fluorescence in photonic/plasmonic nanostructures are very important for long-distance secure quantum communication. From all known nanostructures plasmonic nanoantennas provide both the highest reported emission rate enhancements and the highest photon flux increase from single emitters [1][2][3][4][5][6]. From all types of plasmonic nanoantennas the highest Purcell factor with increasing emitter radiative decay rate (~1,000 times), see, e.g., [2], and 2,300-fold enhancement in the total fluorescence intensity [3] were obtained with metal plasmonic patch (gap) nanoantennas.…”

“…and a metal film. Silver nanoparticles, for instance, silver nanocubes [2][3][4][5][6] or their arrays [6] are used in patch nanoantennas for emitter fluorescence enhancement in visible spectral range [2][3][4][5][6] as well as for increasing stability and brightness of organic light emitting devices (OLEDs) [9]. In this paper we describe two experimentally observed effects that may influence performance of single-photon sources with modern patch plasmonic nanoantennas based on colloidal silver nanoparticles under continuous wave (cw) laser excitation (either 532 or 633 nm):…”