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Terahertz Generation from Plasmonic Metasurfaces

Fang, M; Huang, Z; Wu, X; Sha, WEI; (2018) Terahertz Generation from Plasmonic Metasurfaces. In: 2018 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), 21-24 July 2018, Xuzhou, China. IEEE Green open access

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Abstract

We numerically report a novel THz generation method based on plasmonic metasurface consist of single layer split-ring resonators array. The terahertz generation originates from nonlinear optical rectification in meta-atoms is broadband and free from phase match conditions. The strong linear response and inherent nonlinear behaviors in plasmonic metasurface can be described by a time-domain hydrodynamic model, in which both surface and bulk contributions of nonlinearity are considered. The coupled Maxwell-hydrodynamic system capturing full-wave physics and free electron dynamics is solved with a parallel finite-difference time-domain (FDTD) method. The proposed method is fundamentally important to design nonlinear plasmonic nanodevices, especially for efficient and broadband THz emitters.

Type: Proceedings paper
Title: Terahertz Generation from Plasmonic Metasurfaces
Event: Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC)
ISBN-13: 9781538664230
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/CSQRWC.2018.8455297
Publisher version: https://doi.org/10.1109/CSQRWC.2018.8455297
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Hydrodynamic model , nonlinear plasmonic nanodevice , finite-difference time-domain (FDTD) , terahertz emission , metasurface
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/10065538
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