CST – Computer Simulation Technology

Waveguide artefacts in terahertz near field imaging
M. Misra, S.R Andrews, S.A Maier
Applied Physics Letters
Volume: 100 , Issue: 19 , May 2012
191109-1 - 191109-3
Waveguide artefacts, terahertz field imaging
We report experimental and computional 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.

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