Quantum dot materials for terahertz generation applications

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Leyman, Ross R. and Gorodetsky, Andrei and Bazieva, Natalia and Molis, Gediminas and Krotkus, Arūnas and Clarke, Edmund and Rafailov, Edik U. (2016) Quantum dot materials for terahertz generation applications. Laser and Photonics Reviews, 10 (5). pp. 772-779. ISSN 1863-8880 (https://doi.org/10.1002/lpor.201500176)

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Abstract

Compact and tunable semiconductor terahertz sources providing direct electrical control, efficient operation at room temperatures and device integration opportunities are of great interest at the present time. One of the most well-established techniques for terahertz generation utilises photoconductive antennas driven by ultrafast pulsed or dual-wavelength continuous wave laser systems, though some limitations, such as confined optical wavelength pumping range and thermal breakdown, still exist. The use of quantum dot-based semiconductor materials, having unique carrier dynamics and material properties, can help to overcome limitations and enable efficient optical-to-terahertz signal conversion at room temperatures. Here we discuss the construction of novel and versatile terahertz transceiver systems based on quantum dot semiconductor devices. Configurable, energy-dependent optical and electronic characteristics of quantum-dot-based semiconductors are described, and the resonant response to optical pump wavelength is revealed. Terahertz signal generation and detection at energies that resonantly excite only the implanted quantum dots opens the potential for using compact quantum dot-based semiconductor lasers as pump sources. Proof-of-concept experiments are demonstrated here that show quantum dot-based samples to have higher optical pump damage thresholds and reduced carrier lifetime with increasing pump power.

ORCID iDs

Leyman, Ross R. ORCID logoORCID: https://orcid.org/0000-0002-0789-9595, Gorodetsky, Andrei, Bazieva, Natalia, Molis, Gediminas, Krotkus, Arūnas, Clarke, Edmund and Rafailov, Edik U.;
  • Item type:Article
    ID code:57992
    Dates:
    Date
    Event
    22 September 2016
    Published
    4 August 2016
    Published Online
    21 July 2016
    Accepted
    Notes:This is the peer reviewed version of the following article: Leyman, R. R., Gorodetsky, A., Bazieva, N., Molis, G., Krotkus, A., Clarke, E., & Rafailov, E. U. (2016). Quantum dot materials for terahertz generation applications. Laser and Photonics Reviews, 10(5), 772-779., which has been published in final form at https://dx.doi.org/10.1002/lpor.201500176. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    Subjects:Science > Physics
    Department:Faculty of Science > Physics > Institute of Photonics
    Depositing user: Pure Administrator
    Date deposited:30 Sep 2016 08:42
    Last modified:25 Nov 2024 01:12
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/57992
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