Transforming terahertz plasmonics within subwavelength hole arrays into enhanced terahertz mission via Smith-Purcell effect | Zendy

Zijia Yu | Zendy; Yucheng Liu | Zendy; Weihao Liu | Zendy

Open Access

Transforming terahertz plasmonics within subwavelength hole arrays into enhanced terahertz mission via Smith-Purcell effect

Author(s) -

Zijia Yu,

Yucheng Liu,

Weihao Liu

Publication year - 2020

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.389266

Subject(s) - terahertz radiation , plasmon , optics , physics , photomixing , terahertz gap , metamaterial , terahertz spectroscopy and technology , radiation , optoelectronics , purcell effect , surface plasmon , wavelength , far infrared laser , terahertz metamaterials , laser , spontaneous emission

We illustrate the transformation of terahertz plasmonics within an array of rectangular sub-wavelength holes (RSHs) into coherent and enhanced terahertz emission via Smith-Purcell effect. The radiative plasmonic modes within each RSH of the array are successively excited by an free-electron beam, which then generate coherent radiation by constructive interference. Compared with the case without taking plasmonics into consideration, the radiation field intensity is enhanced by more than an order of magnitude, affording a promising way of developing high-power terahertz radiation. We perform detailed analysis of the plasmonic modes within the RSH by using the dielectric waveguide theory, and the results are verified by numerical simulations. The influences of the RSH parameters on the radiation properties are revealed and discussed.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research