Cited by 88Terahertz technology and applicationsLaser-Matter Interactions and ApplicationsPlasmonic and Surface Plasmon Research

Generation of ultrafast terahertz radiation pulses on metallic nanostructured surfaces

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Welsh, Gregor H., Wynne, Klaas·2009·Optics Express

Abstract

A resonant "incoherent" rectification process is presented relying on the excitation of surface plasmons on a nanostructured metal surface. Excitation of gold and silver films with 800-nm femtosecond laser pulses results in the emission of terahertz radiation with an angle-dependent efficiency and an approximately third-order power dependence. It is shown that the source of this terahertz pulse generation is the surface-plasmon-assisted multiphoton ionization and ponderomotive acceleration in the evanescent field of the surface plasmon. Simple models are used to understand the forces and dynamics near the surface.

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Crossref · 10.1364/oe.17.002470

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37 of 37 references verified0 citation errors · 0 not checkable

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  • A cut-wire resonator with an inversion center is expected to produce no optical rectification and no THz generation unless by other mechanisms such as near-field ponderomotive acceleration of surface-plasmon-assisted out-of-plane photoelectrons through multiphoton absorption.

    “As the cut-wire resonator (Fig. 9c1) exhibits a symmetry with an inversion center, no optical rectification and THz generation is expected (due to cancellation as shown in Fig. 9c1 and discussed below), unless by other mechanisms such as near-field ponderomotive acceleration of surface-plasmon-assisted out-of-plane photoelectrons through multiphoton absorption175,203.”

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Authors
Welsh, G. H., & Wynne, K.
Affiliations
University of Strathclyde (GB)
Venue
Optics Express
Published
2009-02-05
Volume
17
Issue
4
Pages
2470
ISSN
1094-4087 (ISSN-L)
OpenAlex
W2144633655
Cited by
88
References
37
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 8 · 2022: 6 · 2021: 4 · 2020: 4 · 2019: 13 · 2018: 3 · 2017: 5 · 2016: 5 · 2015: 10 · 2014: 5 · 2013: 5 · 2012: 6
FWCI
3.70
Type
journal article
Language
en
Open access
Locations
  • Optics Express (publishedVersion)
  • PubMed (publishedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
Funders
Engineering and Physical Sciences Research Council (EP/E046541/1, GR/S95510/01, GR/R97566/01)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
  • Physical Sciences › Engineering › Biomedical Engineering › Plasmonic and Surface Plasmon Research
Keywords
terahertz pulse generation, surface plasmons, multiphoton ionization, ponderomotive acceleration, evanescent field, gold films, silver films, femtosecond pulses
MeSH terms
Computer Simulation, Gold, Infrared Rays, Microwaves, Models, Chemical, Silver, Surface Plasmon Resonance, Nanostructures

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