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

Publisher's version (útgefin grein) 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...

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Bibliographic Details
Published in:Nanomaterials
Main Authors: Abdullah, Nzar, Tang, Chi-Shung, Manolescu, Andrei, Gudmundsson, Vidar
Other Authors: Raunvísindastofnun (HÍ), Science Institute (UI), Verkfræði- og náttúruvísindasvið (HÍ), School of Engineering and Natural Sciences (UI), School of Science and Engineering (RU), Tækni- og verkfræðideild (HR), Háskóli Íslands, University of Iceland, Háskólinn í Reykjavík, Reykjavik University
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2019
Subjects:
Cavity-quantum electrodynamics
Electro-optical effects
Quantum dot
Quantum master equation
Quantum transport
Skammtafræði
Rafsegulfræði
Iceland
Online Access:https://hdl.handle.net/20.500.11815/1683
https://doi.org/10.3390/nano9071023
Description
Summary:Publisher's version (útgefin grein) 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. This work was financially supported by the Research Fund of the University of Iceland, the Icelandic Research Fund, grant No. 163082-051, and the Icelandic Infrastructure Fund. Peer Reviewed

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