Enhanced THz Generation From Interdigitated Quantum Dot Based Photoconductive Antenna Operating in a Quasi-ballistic Regime


In this paper, we present a new approach for the enhancement of pulsed terahertz (THz) generation in quantum dot (QD) based photoconductive antennas (PCA). We demonstrate the benefits of the combination of a QD substrate based PCA and an interdigitated electrodes topology which allows the photocarriers to reach the antenna terminals in a quasi-ballistic regime and immediately contribute to the THz emission. A 50-fold increase in the generated THz power is observed. Such enhancement is made possible by unique combination of QD substrate properties, such as very high electric and thermal breakdown ruggedness, high carrier mobility, and yet short carrier lifetimes, compared to typical low temperature grown materials. We expect this solution to become favourable for development of powerful compact THz emitters.

Publication DOI: https://doi.org/10.1109/JSTQE.2023.3271830
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Copyright © 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Funding & Acknowledgsments: The PCAs were developed within the financial support of the Russian Science Foundation, grant 19-79-10240 (prerequisite simulation and topology) and grant 18-79-10195 (THz characterisation of the PCAs). The technological routine of their fabrication was supported by the Ministry of Science and Higher Education of the Russian Federation in the scope of the government assignment (Agreement 075-03-2023-106 13.01.2023). The authors will also like to acknowledge financial support from EPSRC (Grant no. EP/R024898/1) and EU H2020 (Grant No. 824996).
Uncontrolled Keywords: Principal component analysis,Electrodes,Antennas,Topology,Substrates,Plasmons,Photoconductivity,photoconducting devices,photoconductivity,terahertz materials,Broadband antennas,quantum dots,terahertz radiation,Atomic and Molecular Physics, and Optics,Electrical and Electronic Engineering
Publication ISSN: 1558-4542
Last Modified: 17 Jun 2024 08:14
Date Deposited: 11 May 2023 15:47
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Related URLs: https://ieeexpl ... ument/10114948/ (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2023-09
Published Online Date: 2023-05-03
Accepted Date: 2023-04-23
Authors: Gorodetsky, Andrei
Lavrukhin, Denis V.
Ponomarev, Dmitry S.
Smirnov, Semyon V.
Yadav, Amit (ORCID Profile 0000-0001-7865-6905)
Khabibullin, Rustam A.
Rafailov, Edik U. (ORCID Profile 0000-0002-4152-0120)



Version: Accepted Version

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