Photon-assisted Fano Resonance and Corresponding Shot-Noise in a Quantum Dot

TL;DR

This paper investigates photon-assisted Fano resonance in quantum dots, revealing how interference affects transport properties and shot noise, with novel predictions about Fano profiles in satellite peaks and phase-dependent noise characteristics.

Contribution

It introduces the first prediction of Fano profile appearances in satellite peaks and analyzes interference effects on photon-assisted transport and shot noise in quantum dots.

Findings

Fano profiles appear in satellite peaks of photon-assisted transport.

Interference effects cause non-synchronous variations in Fano profiles.

Shot noise and current depend on phase, reflecting resonant and nonresonant channel properties.

Abstract

We have studied the Fano resonance in photon-assisted transport in a quantum dot and calculated both the coherent current and spectral density of shot noise. It is predicted, for the first time, that the shape of Fano profile will also appear in satellite peaks. It is found that the variations of Fano profiles with the strengths of nonresonant transmissions are not synchronous in absorption and emission sidebands. The effect of interference on photon-assisted pumped current has been also investigated. We further predict the current and spectral density of shot noise as a function of the phase, which exhibits an intrinsic property of resonant and nonresonant channels in the structures.