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Proceedings Paper

Near-field imaging of terahertz plasmon waves with a subwavelength aperture probe
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Paper Abstract

Visualization of terahertz (THz) plasmons with local probes allows studying ultra-fast plasmonic phenomena in the time domain. We demonstrate that the integrated sub-wavelength aperture near-field probe can be used to map THz surface plasmon waves in space and time with high resolution. Using experimental near-field observations of plasmon waves formed on a metallic surface by tightly focused THz pulses and of standing plasmon waves in THz antennas, we show that this probe detects the spatial derivative of the electric field rather than the plasmon field itself. The understanding of the coupling mechanism provides a framework for interpretation of near-field images.

Paper Details

Date Published: 6 September 2011
PDF: 6 pages
Proc. SPIE 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX, 809605 (6 September 2011); doi: 10.1117/12.893064
Show Author Affiliations
Oleg Mitrofanov, Univ. College London (United Kingdom)
Raimund Mueckstein, Univ. College London (United Kingdom)


Published in SPIE Proceedings Vol. 8096:
Plasmonics: Metallic Nanostructures and Their Optical Properties IX
Mark I. Stockman, Editor(s)

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