Figure 4
From: Continuously Frequency-Tuneable Plasmonic Structures for Terahertz Bio-sensing and Spectroscopy
THz transmission measurement results of the SBE structure. (a) Illustration of the experimental set up used to measure the THz spectra. Schematics of (b) linearly and (c) circularly polarized THz irradiation onto the surface of the SBE structure. (d) Transmission spectra for the SBE grooves with different AoPs of the incident THz wave, showing five distinct highly tuneable transmission bands. (e) THz transmission spectra when the polarization direction of incident THz waves slightly changed around 0 degree. (f) The bold black line represents the transmission spectrum of the SBE for the circularly polarized THz irradiation. The colour lines correspond to the transmission spectra of the SBE for linearly polarized THz irradiation, where the AoP increased from 0 degrees to 180 degrees with a step size of 5 degrees.
