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Manifestation of the Purcell Effect in Current Transport through a Dot–Cavity–QED System

Manifestation of the Purcell Effect in Current Transport through a Dot–Cavity–QED System


Title: Manifestation of the Purcell Effect in Current Transport through a Dot–Cavity–QED System
Author: Abdullah, Nzar Rauf
Tang, Chi-Shung
Manolescu, Andrei   orcid.org/0000-0002-0713-4664
Gudmundsson, Vidar   orcid.org/0000-0001-8939-3522
Date: 2019-07-17
Language: English
Scope: 1023
University/Institute: Háskóli Íslands
University of Iceland
Háskólinn í Reykjavík
Reykjavik University
School: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
School of Science and Engineering (RU)
Tækni- og verkfræðideild (HR)
Department: Raunvísindastofnun (HÍ)
Science Institute (UI)
Series: Nanomaterials;9(7)
ISSN: 2079-4991
DOI: 10.3390/nano9071023
Subject: Cavity-quantum electrodynamics; Electro-optical effects; Quantum dot; Quantum master equation; Quantum transport; Skammtafræði; Rafsegulfræði
URI: https://hdl.handle.net/20.500.11815/1683

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Citation:

Abdullah, N.R.; Tang, C.-S.; Manolescu, A.; Gudmundsson, V. Manifestation of the Purcell Effect in Current Transport through a Dot–Cavity–QED System. Nanomaterials 2019, 9, 1023.

Abstract:

We study the transport properties of a wire-dot system coupled to a cavity and a photon reservoir. The system is considered to be microstructured from a two-dimensional electron gas in a GaAs heterostructure. The 3D photon cavity is active in the far-infrared or the terahertz regime. Tuning the photon energy, Rabi-resonant states emerge and in turn resonant current peaks are observed. We demonstrate the effects of the cavity–photon reservoir coupling, the mean photon number in the reservoir, the electron–photon coupling and the photon polarization on the intraband transitions occurring between the Rabi-resonant states, and on the corresponding resonant current peaks. The Rabi-splitting can be controlled by the photon polarization and the electron–photon coupling strength. In the selected range of the parameters, the electron–photon coupling and the cavity-environment coupling strengths, we observe the results of the Purcell effect enhancing the current peaks through the cavity by increasing the cavity–reservoir coupling, while they decrease with increasing electron–photon coupling. In addition, the resonant current peaks are also sensitive to the mean number of photons in the reservoir.

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

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