Non-Markovian dynamics in plasmon-induced spontaneous emission interference

Abstract

We investigate theoretically the non-Markovian dynamics of a degenerate V-type quantum emitter in the vicinity of a metallic nanosphere, a system that exhibits quantum interference in spontaneous emission due to the anisotropic Purcell effect. We calculate numerically the electromagnetic Green's tensor and employ the effective modes differential equation method for calculating the quantum dynamics of the emitter population, with respect to the resonance frequency and the initial state of the emitter, as well as its distance from the nanosphere. We find that the emitter population evolution varies between a gradually total decay and a partial decay combined with oscillatory population dynamics, depending strongly on the specific values of the above three parameters. Under strong coupling conditions, coherent population trapping can be observed in this system. We compare our exact results with results when the flat continuum approximation for the modified by the metallic nanosphere vacuum is applied. We conclude that the flat continuum approximation is an excellent approximation only when the spectral density of the system under study is characterized by non-overlapping plasmonic resonances.

Signatures of quantized coupling between quantum emitters and localized surface plasmons

“…It endows the multiple-QE system coupled to metal nanostructures with a promising route to suppress the loss of LSPs in metal [27,28]. Going be- * anjhong@lzu.edu.cn † haiqing0@csrc.ac.cn yond the weak-coupling description of QE-LSP interactions [29][30][31], it has been found that the LSPs can act as a quantum bus to mediate the coherent interactions and generate the entanglement among QEs [32][33][34]. However, such quantum coherence is dynamically transient and tends to vanish in the long-time limit.…”

Light-matter interaction of a quantum emitter near a half-space graphene nanostructure

“…We find that the Purcell factor takes very large values, larger than 10 8 , near the edge of the graphene half-space geometry. We also show that when the QE/graphene half-space nanostructure separation is small, we enter the strong light-matter coupling regime [14,[40][41][42][43][44][45][46]. At this regime the combined system QE/half-space geometry coherently exchange energy between its two constituent elements.…”

Photon antibunching control in a quantum dot and metallic nanoparticle hybrid system with non-Markovian dynamics

“…Moreover, the antibunching behavior of the emitted photons can be controlled by the geometrical parameters of the system, namely, the quantum dot-metal nano particle separation distance, as well as the system's physical parameters including the detuning frequency of the quantum dot transitions with respect to the surface plasmon modes, and the Rabi frequency of the polarized driving field. Additionally, the studied system has the potential to be a highly controllable single-photon source.(LDOS) around the MNP dramatically [31][32][33][34][35][36]. When a QD, as an emitter, is located in the evanescent field of an MNP, the decay rate of the QD is affected through the LDOS and increases significantly [31][32][33]36].…”

“…Additionally, the studied system has the potential to be a highly controllable single-photon source.(LDOS) around the MNP dramatically [31][32][33][34][35][36]. When a QD, as an emitter, is located in the evanescent field of an MNP, the decay rate of the QD is affected through the LDOS and increases significantly [31][32][33]36]. The physical features of the QD-MNP system can be controlled by the geometry of the hybrid system, i.e., the shape of the MNP and the QD-MNP separation distance.…”