Waveguide artefacts in terahertz near field imaging

We report experimental and computational studies of the behaviour of a photoconductive THz near field probe when imaging a simple planar metal-dielectric structure. We show that the excitation of waveguide modes in the gap between sample and probe, together with diffraction at the probe, must genera...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2012-05, Vol.100 (19), p.191109-191109-3
Main Authors: Misra, M., Andrews, S. R., Maier, S. A.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report experimental and computational studies of the behaviour of a photoconductive THz near field probe when imaging a simple planar metal-dielectric structure. We show that the excitation of waveguide modes in the gap between sample and probe, together with diffraction at the probe, must generally be taken into account when analysing images and that electromagnetic simulations provide a very useful aid to interpretation.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4714532