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

Andrei Gorodetsky; Denis V. Lavrukhin; Dmitry S. Ponomarev; Semyon V. Smirnov; Amit Yadav; Rustam A. Khabibullin; Edik U. Rafailov

doi:10.1109/JSTQE.2023.3271830

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

Andrei Gorodetsky, Denis V. Lavrukhin, Dmitry S. Ponomarev, Semyon V. Smirnov, Amit Yadav, Rustam A. Khabibullin, Edik U. Rafailov

Aston Institute of Photonic Technologies (AiPT)

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	8500505
Number of pages	5
Journal	IEEE Journal of Selected Topics in Quantum Electronics
Volume	29
Issue number	5
Early online date	3 May 2023
DOIs	https://doi.org/10.1109/JSTQE.2023.3271830
Publication status	Published - Sept 2023

Bibliographical note

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).

Keywords

Principal component analysis
Electrodes
Antennas
Topology
Substrates
Plasmons
Photoconductivity
photoconducting devices
photoconductivity
terahertz materials
Broadband antennas
quantum dots
terahertz radiation

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Gorodetsky, A., Lavrukhin, D. V., Ponomarev, D. S., Smirnov, S. V., Yadav, A., Khabibullin, R. A., & Rafailov, E. U. (2023). Enhanced THz Generation From Interdigitated Quantum Dot Based Photoconductive Antenna Operating in a Quasi-ballistic Regime. IEEE Journal of Selected Topics in Quantum Electronics, 29(5), Article 8500505. https://doi.org/10.1109/JSTQE.2023.3271830

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

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