Förster resonance energy transfer between individual semiconductor nanocrystals and an InP film

Abstract

Abstract. The modification of the radiative decay of a single emitter in close vicinity to a dielectric interface is investigated by studying the photoluminescence (PL) decay dynamics of colloidal semiconductor nanocrystals (NCs) deposited on semiconductor surfaces. The PL decay lifetimes of single CdSe/CdS NCs spin-coated on InP surfaces passivated with thin oxide layers are measured. Electrochemical passivation of the InP surfaces with oxide layers of different thicknesses enables to study the influence of the distance between the semiconductor surface and the NC on the lifetime. A shortening of the PL decay lifetimes of the NCs with respect to their lifetimes on glass strongly suggests the opening of recombination channels for the photogenerated exciton, which we attribute to energy transfer between the NC and the semiconductor. We also experimentally show the influence of the orientation of the NC with respect to the semiconductor surface on the coupling.

Near-Field Modulation of Differently Oriented Single Photon Emitters with A Plasmonic Probe

“…It can also be understood that the interaction between the SPPs and SPE is significantly stronger with a decrease in d Z , leading to a marked increase in the Purcell factor. 32,33 This is consistent with the results indicated in Figure 2b and the inset of Figure 1b. For the in-plane (X/Y) polarized electric-field component, a small distribution of the SPP modes was observed in the near-field central region of the AgNW tip; instead, a significant in-plane polarized electric field was found at the edges of the AgNW tip.…”