Journal
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volume 119, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physe.2020.113996
Keywords
Purcell effect; Cavity-Quantum electrodynamics; Quantum transport; Quantum Dot; Quantum master equation
Funding
- Research Fund of the University of Iceland
- Icelandic Research Fund [163082-051]
- Icelandic Infrastructure Fund
- University of Sulaimani
- Komar University of Science and Technology
- Ministry of Science and Technology, Taiwan [MOST 106-2112-M-239-001-MY3]
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We theoretically investigate the characteristics of the electron transport through a two-dimensional a quantum dot system in the xy-plane coupled to a photon cavity and a photon reservoir, the environment. The electronphoton coupling, g(gamma), and the cavity-reservoir coupling, kappa, are tuned to study the system in the weak, g(gamma )<= kappa and the strong coupling regime, g(gamma) > kappa. An enhancement of current is both seen with increasing g, and If in the weak coupling regime for both x- and y-polarization of the photon field. This is a direct consequence of the Purcell effect. The current enhancement is due to the contribution of the photon replica states to the electron transport in which intraband transitions play an important role. The properties of the electron transport are drastically changed in the strong coupling regime with an x-polarized photon field in which the current is suppressed with increasing g(gamma), but it is still increasing with kappa. This behavior of the current is related to the population of purely electronic states and depopulation of photon replica states.
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