Resonant plasmon-assisted tunneling in a double quantum dot coupled to a quantum-Hall plasmon resonator

TL;DR

This paper demonstrates the coupling of a quantum Hall plasmon resonator with a double quantum dot, enabling resonant plasmon-assisted tunneling and opening avenues for exploring strong plasmon-electron interactions in quantum electrodynamics.

Contribution

It reports the first experimental observation of resonant plasmon-assisted tunneling in a double quantum dot coupled to a quantum Hall plasmon resonator, with tunable coupling strength.

Findings

Resonant plasmon-assisted tunneling observed in DQD.

Plasmon energy and coupling strength can be controlled.

Potential for studying strong plasmon-electron coupling regimes.

Abstract

Edge magnetoplasmon is an emergent chiral bosonic mode promising for studying electronic quantum optics. While the plasmon transport has been investigated with various techniques for decades,its coupling to a mesoscopic device remained unexplored. Here, we demonstrate the coupling between a single plasmon mode in a quantum Hall plasmon resonator and a double quantum dot (DQD). Resonant plasmon-assisted tunneling is observed in the DQD through absorbing or emitting plasmons stored in the resonator. By using the DQD as a spectrometer, the plasmon energy and the coupling strength are evaluated, which can be controlled by changing the electrostatic environment of the quantum Hall edge. The observed plasmon-electron coupling encourages us for studying strong coupling regimes of plasmonic cavity quantum electrodynamics.