Coherent Controllable Transport of a Surface Plasmon Coupled to Plasmonic Waveguide with a Metal Nano Particle-Semiconductor Quantum Dot Hybrid System

TL;DR

This paper theoretically investigates how a hybrid nanosystem of a semiconductor quantum dot and a metallic nanoparticle coupled to a surface plasmonic waveguide can be used to controllably switch and direct single plasmon transport, with potential applications in quantum devices.

Contribution

It introduces a method to control single plasmon transport using a hybrid SQD-MNP system, enabling tunable transmission and reflection for quantum device applications.

Findings

Controllable plasmon transport achieved by adjusting interparticle distance and nanoparticle size.

Hybrid exciton formation due to dipole coupling influences plasmon transmission.

Potential applications in quantum switches, single-photon transistors, and nanolasers.

Abstract

By using the real-space method, switching of a single plasmon interacting with a hybrid nanosystem composed of a semiconductor quantum dot (SQD) and a metallic nanoparticle (MNP) coupled to one-dimensional surface plasmonic waveguide is investigated theoretically. We discussed that the dipole coupling between an exciton and a localized surface plasmon results in the formation of a hybrid exciton and the transmission and reflection of the propagating single plasmon could be controlled by changing the interparticle distance between the SQD and the MNP and the size of the nanoparticles. The controllable transport of the propagating single surface plasmon by such a nanosystem discussed here could find the significant potential in the design of next-generation quantum devices such as plasmonic switch, single photon transistor and nanolaser and quantum information.