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Updated: May 28, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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THz generation from plasmonic nanoparticle arrays.

D K Polyushkin1, E Hendry, E K Stone

  • 1School of Physics and Astronomy, Exeter EX4 4Ql, United Kingdom.

Nano Letters
|October 20, 2011
PubMed
Summary
This summary is machine-generated.

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Researchers demonstrate terahertz (THz) pulse generation from silver nanoparticles using femtosecond laser pulses. This confirms theoretical models of photoelectrons ejected by plasmon-enhanced excitation and accelerated by light forces.

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Condensed Matter Physics

Background:

  • Terahertz (THz) pulse generation is crucial for various applications.
  • Theoretical models predict THz generation from plasmonic nanoparticles.
  • Experimental verification of these models is needed.

Purpose of the Study:

  • To provide experimental evidence for THz pulse generation from silver nanoparticle arrays irradiated by femtosecond laser pulses.
  • To investigate the underlying physical mechanisms, including plasmon-mediated multiphoton excitation and ponderomotive forces.
  • To explore the influence of laser intensity and nanoparticle morphology on THz emission.

Main Methods:

  • Irradiation of silver nanoparticle arrays with femtosecond laser pulses.

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Published on: September 27, 2011

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Last Updated: May 28, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
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09:29

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

  • Measurement of generated THz pulses.
  • Comparison of experimental results with a theoretical model involving photoemission and ponderomotive acceleration.
  • Systematic variation of laser pulse intensity and nanoparticle morphology.

    • Main Results:

    • Reproducible experimental evidence for THz pulse generation was obtained.
    • The results support theoretical predictions involving plasmon-mediated multiphoton excitation.
    • THz emission dependence on laser intensity and nanoparticle morphology was observed.
    • The role of the particle plasmon mode in the THz generation process was verified.

    Conclusions:

    • Femtosecond laser irradiation of silver nanoparticles is a viable method for THz pulse generation.
    • The observed THz generation is explained by photoelectrons accelerated by ponderomotive forces within the plasmon field.
    • This work validates theoretical predictions and highlights the importance of plasmonic effects.