Cited by 137Terahertz technology and applicationsLaser-Matter Interactions and ApplicationsPlasmonic and Surface Plasmon Research

THz Generation from Plasmonic Nanoparticle Arrays

Polyushkin, D. K., Hendry, E., Stone, E. K., Barnes, W. L.·2011·Nano Letters

Abstract

We investigate the generation of THz pulses when arrays of silver nanoparticles are irradiated by femtosecond laser pulses, providing the first reproducible experimental evidence in support of recent theoretical predictions of such an effect. We assess our results in the context of a model where photoelectrons are produced by plasmon-mediated multiphoton excitation, and THz radiation is generated via the acceleration of the ejected electrons by ponderomotive forces arising from the inhomogeneous plasmon field. By exploring the dependence of the THz emission on the femtosecond pulse intensity and as a function of metal nanoparticle morphology, and by comparing measurements to numerical modeling, we are able to verify the role of the particle plasmon mode in this process.

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Crossref · 10.1021/nl202428g

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  • Nanoscale structuring of metal films enhances THz emission.

    “subsequent investigations found enhanced THz emission due to nanoscale structuring, including with gratings175–177, randomly-distributed nanostructuring178–182, and precision lithographically-defined nanostructure arrays159,178 (Fig. 8a).”
  • THz emission spectroscopy provides new capabilities for studying ultrafast dynamics of charges moving within materials (internal photocurrents) and in free space (external photocurrents), with the benefit of operating at ambient pressures rather than high or ultrahigh vacuum.

    “THz emission spectroscopy provides new capabilities for studying the ultrafast dynamics of charges moving within materials (internal photocurrents) and in free space (external photocurrents), with the added benefit of operating at ambient pressures178 rather than at high or ultrahigh vacuum.”

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Authors
Polyushkin, D. K., Hendry, E., Stone, E. K., & Barnes, W. L.
Affiliations
University of Exeter (GB)
Corresponding author
Barnes, W. L.
Venue
Nano Letters
Published
2011-10-25
Volume
11
Issue
11
Pages
4718-4724
ISSN
  • 1530-6984 (ISSN-L)
  • 1530-6992
OpenAlex
W2000090629
Cited by
137
References
34
Citations by year
2026: 1 · 2025: 10 · 2024: 11 · 2023: 11 · 2022: 10 · 2021: 3 · 2020: 6 · 2019: 12 · 2018: 6 · 2017: 9 · 2016: 10 · 2015: 21 · 2014: 11 · 2013: 6 · 2012: 10
FWCI
6.04
Type
journal article
Language
en
Open access
closed
Locations
  • Nano Letters (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Research Councils UK
  • Engineering and Physical Sciences Research Council (EP/F026757/1, EP/C52389X/1)
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 generation, plasmonic nanoparticle arrays, silver nanoparticles, femtosecond pulses, photoemission, multiphoton excitation, ponderomotive force, nanoparticle morphology
MeSH terms
Materials Testing, Particle Size, Scattering, Radiation, Surface Plasmon Resonance, Nanostructures, Terahertz Radiation

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