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Updated: May 6, 2026
12:57
Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
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Electron transport through a quantum dot assisted by cavity photons
Nzar Rauf Abdullah1, Chi-Shung Tang, Andrei Manolescu
1Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland.
Summary
We studied electron transport in a quantum dot, observing current peaks due to electron-photon interactions. Photon-assisted transport was enhanced with x-polarized light but suppressed with y-polarized light due to system geometry.
Area of Science:
- Quantum physics
- Condensed matter physics
- Mesoscopic systems
Background:
- Electron transport through quantum dots is crucial for quantum computing.
- Understanding electron-photon interactions is key to developing quantum devices.
- Non-Markovian dynamics play a significant role in transient quantum phenomena.
Purpose of the Study:
- To investigate transient electron transport through a single quantum dot coupled to a cavity photon mode.
- To analyze the influence of photon polarization on electron transport dynamics.
- To explore photon-assisted transport phenomena in a tunable quantum system.
Main Methods:
- Utilized a non-Markovian density-matrix formalism to model electron-photon interactions.
- Simulated electron transport in a quantum dot embedded within a finite quantum wire.
- Investigated the system's response to x-polarized and y-polarized photon fields.
Main Results:
- Observed resonant current peaks in the absence of a photon cavity by tuning the plunger gate.
- Identified additional side peaks in the current spectrum due to photon-assisted transport with an x-polarized photon field.
- Found that photon-assisted transport features were suppressed under y-polarized photon fields due to system anisotropy.
Conclusions:
- Electron transport through quantum dots is significantly modulated by cavity photon interactions.
- Photon polarization dictates the effectiveness of photon-assisted transport, offering a control mechanism.
- The geometric anisotropy of the quantum dot system influences electron-photon scattering processes.
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