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Updated: May 6, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

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Published on: July 8, 2013

Highly efficient broadband ultrafast plasmonics.

Brian Ashall, José Francisco López-Barberá, Éadaoin McClean-Ilten

|November 13, 2013

Summary

Researchers explored ultrafast dynamics of Surface Plasmon Polaritons (SPPs) using custom nanostructures. This work demonstrates efficient excitation of broadband SPP modes for faster optical processes.

Area of Science:

Nanophotonics
Ultrafast Optics
Plasmonics

Background:

Surface Plasmon Polaritons (SPPs) enable nanoscale spatial control of light.
Research on the ultrafast dynamics of SPPs is underexplored.
SPPs offer potential for extremely fast optical processes.

Purpose of the Study:

To experimentally and computationally investigate efficient excitation of broadband, propagating SPP modes.
To explore the ultrafast dynamics of SPPs.
To enable nanoscale spatial manipulation of ultrafast optical processes.

Main Methods:

Fabrication of a surface array of tailor-designed, reduced symmetry nanostructures.
Utilizing sub-20 fs pulses in the near-infrared.
Employing optical spectroscopy and frequency-resolved optical gating (FROG) techniques.

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Last Updated: May 6, 2026

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Complementing experimental data with finite element computational analysis.

Main Results:

Demonstration of efficient excitation of broadband, propagating plasmonic modes.
Tailored nanostructures enabled control of the plasmon dispersion map.
Successful matching of nanostructure properties to sub-20 fs optical pulses.

Conclusions:

The developed system provides access to efficient excitation of broadband SPP modes.
This research opens avenues for exploring ultrafast phenomena in plasmonics.
The findings facilitate the integration of ultrafast optical processes with nanoscale spatial control.