Figure 5
From: Continuously Frequency-Tuneable Plasmonic Structures for Terahertz Bio-sensing and Spectroscopy
THz spectroscopic measurements with the SBE. (a) THz transmission spectra for a pharmaceutical tablet (bufferin) on the SBE. The data were taken at three different focus points, and the average of three data points was plotted together with a guideline. The AoP was varied by rotating the SBE. (b) THz transmission spectra for the same tablet as (a), measured by conventional mirror-based THz focusing (far-field measurement configuration). The THz spectra at three different points were measured. In (a,b), the difference in the THz spectra between the areas on the tablet is partly due to the inhomogeneous thickness of the tablet.
