Detecting non-Markovian plasmonic band gaps in quantum dots using electron transport

TL;DR

This paper explores how non-Markovian effects like band-edge and retardation influence quantum dot behavior near metal nanowires, proposing current-noise measurements as a detection method and linking surface plasmons with quantum transport phenomena.

Contribution

It demonstrates the observation of non-Markovian effects in quantum dot systems via current-noise, connecting plasmonic phenomena with quantum transport measurements.

Findings

Non-Markovian effects can be detected through current-noise measurements.

Surface-plasmon interactions significantly alter quantum dot decay behavior.

The approach applies to similar systems like phononic cavities and photonic waveguides.

Abstract

Placing a quantum dot close to a metal nanowire leads to drastic changes in its radiative decay behavior because of evanescent couplings to surface plasmons. We show how two non-Markovian effects, band-edge and retardation, could be observed in such a system. Combined with a quantum dot p-i-n junction, these effects could be readout via current-noise measurements. We also discuss how these effects can occur in similar systems with restricted geometries, like phononic cavities and photonic crystal waveguides. This work links two previously separate topics: surface-plasmons and current-noise measurements.