Journal of Infrared, Millimeter, and Terahertz Waves

, Volume 32, Issue 8, pp 1020–1030

Electromagnetic Wave Propagation Close to Microstructures Studied by Time and Phase-Resolved THz Near-Field Imaging

Article

DOI: 10.1007/s10762-011-9772-y

Cite this article as:
Walther, M. & Bitzer, A. J Infrared Milli Terahz Waves (2011) 32: 1020. doi:10.1007/s10762-011-9772-y
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Abstract

We demonstrate microscopic mapping of electromagnetic waves close to metal microstructures with sub-ps temporal and sub-wavelength spatial resolution by pulsed THz near-field imaging. The inherent phase-sensitivity of this technique allows mapping wavefronts of propagating modes and the measured amplitude distributions provide information on field concentration and localization close to the structures. Using this approach we investigate wave propagation through a sub-wavelength aperture, as well as the formation of traveling and standing surface waves along a metal microwire.

Keywords

Near-field imaging Terahertz imaging Microstructures Plasmonics 

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Freiburg Materials Research Center (FMF)University of FreiburgFreiburgGermany
  2. 2.Institute of Applied PhysicsUniversity of BernBernSwitzerland

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