Title :
Scattering in the THz region, measurement prediction and extrapolation
Author :
Appleby, R. ; Saenz, Elena ; Wylde, R. ; Froud, S.
Author_Institution :
Inst. of Electron., Commun. & Inf. Technol. (ECIT), Queen´s Univ. Belfast, Belfast, UK
Abstract :
An instrument has been designed which is capable of measuring scattering from 0.075-0.5 THz. This will enable a more accurate determination of the optical properties of materials by correcting for scatter and also the characterisation of the mechanical properties of the surface. Models have been investigated to help in experimental design and in reducing the number of required measurements by extrapolation. The Generalized Harvey Shack (GHS) method has been evaluated for this purpose. Predictions for 40 grit gold coated sandpaper at 37 degrees incidence angle and 0.8 THz are made showing the surface to be almost completely diffuse. The GHS method was compared to the Integral Equation Model (IEM).
Keywords :
attenuation measurement; extrapolation; mechanical properties; optical properties; surface scattering; terahertz materials; GHS method; IEM; THz region; extrapolation; frequency 0.075 THz to 0.5 THz; generalized Harvey shack; gold coated sandpaper; integral equation model; optical property; scattering measurement prediction; surface mechanical property; Mathematical model; Mirrors; Optical scattering; Radar measurements; Rough surfaces; Surface roughness; Measurement; Prediction; Scattering; Scatterometer;
Conference_Titel :
Antennas and Propagation (EuCAP), 2014 8th European Conference on
Conference_Location :
The Hague
DOI :
10.1109/EuCAP.2014.6902320
