Efficient, 0.35-THz overmoded oscillator based on a two-dimensional periodic surface lattice

MacLachlan, A. J. and Robertson, C. W. and Cross, A. C. and Phelps, A. D. R. (2022) Efficient, 0.35-THz overmoded oscillator based on a two-dimensional periodic surface lattice. IEEE Transactions on Electron Devices, 69 (11). pp. 6342-6347. ISSN 0018-9383 (https://doi.org/10.1109/TED.2022.3209142)

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Abstract

We present the theory, design, and numerical modeling of a cylindrical, two-dimensional periodic surface lattice (2D-PSL) intended for use as the interaction region of an electron beam-driven, pulsed source. The production of 1.95-MW peak, pulsed 0.35-THz radiation with an electronic efficiency of 24% is reported. Mode selection in the oversized cavity, where the diameter D is almost 3.5 × larger than the operating wavelength λ , is achieved by coupling volume and surface fields to form a coupled cavity eigenmode. We demonstrate the advantages (including enhanced output power and improved spectral purity) of using a 2D-PSL over a simpler 1-D structure. The cylindrical D/λ∼3.5 2D-PSL demonstrates the “proof-of-principle” high-order mode coupling with the potential to increase D/λ to values of 20 or more for the realization of CW 2D-PSL sources or very powerful pulsed sources. The theory is applicable over a broad frequency range.

ORCID iDs

MacLachlan, A. J. ORCID logoORCID: https://orcid.org/0000-0002-8960-1683, Robertson, C. W. ORCID logoORCID: https://orcid.org/0000-0002-3552-466X, Cross, A. C. ORCID logoORCID: https://orcid.org/0000-0001-7672-1283 and Phelps, A. D. R. ORCID logoORCID: https://orcid.org/0000-0002-1100-1012;
  • Item type:Article
    ID code:82741
    Dates:
    Date
    Event
    1 November 2022
    Published
    10 October 2022
    Published Online
    19 September 2022
    Accepted
    7 May 2022
    Submitted
    Subjects:Science > Physics > Plasma physics. Ionized gases
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:13 Oct 2022 10:36
    Last modified:11 Nov 2024 13:39
    URI:https://strathprints.strath.ac.uk/id/eprint/82741
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