Resonant tunneling diodes in semiconductor microcavities : Modeling polaritonic features in the terahertz displacement current
Destefani, Carlos Fernando (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Villani, Matteo (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Cartoixà Soler, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Feiginov, Michael (Vienna University of Technology)
Oriols, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)

Date:	2022
Description:	25 pàg.
Abstract:	We develop in this work a qualitative quantum electron transport model, in the strong light-matter coupling regime under dipole approximation, able to capture polaritonic signatures in the time-dependent electrical current. The effect of the quantized electromagnetic field in the displacement current of a resonant tunneling diode inside an optical cavity is analyzed. The original peaks of the bare electron transmission coefficient split into two new peaks due to the resonant electron-photon interaction, leading to coherent Rabi oscillations among the polaritonic states that are developed in the system in the strong coupling regime. This mimics known effects predicted by a Jaynes-Cummings model in closed systems and shows how a full quantum treatment of electrons and electromagnetic fields may open interesting paths for engineering new THz electron devices. The computational burden involved in the multi-time measurements of THz currents is tackled by invoking a Bohmian description of the light-matter interaction. We also show that the traditional static transmission coefficient used to characterize DC quantum electron devices has to be substituted by a new displacement current coefficient in high-frequency AC scenarios.
Grants:	European Commission 881603 European Commission 765426 Agencia Estatal de Investigación PID2021-127840NB-I00 Agencia Estatal de Investigación RTI2018-097876-B-C21 Generalitat de Catalunya 001-P-001644
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Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Quantum description of light-matter interaction ; Quantum transport ; Tunnel junctions ; Jaynes-Cummings model ; Landauer formula ; Terahertz techniques ; Tunnel diode resonance
Published in:	Physical review B, Vol. 106 Núm. 20 (Nov. 2022) , art. 205306, ISSN 2469-9969

DOI: 10.1103/PhysRevB.106.205306

25 p, 2.7 MB

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