Terahertz Spectroscopy and Brewster Angle Reflection Imaging of Acoustic Tiles

Figure 2

Example THz signals produced by the THz-TDS apparatus. (a) Time-domain comparison of a thru-air THz waveform (lower, black) and a thru-tile waveform (upper, gray). The thru-tile signal has been offset and magnified ×5 for clarity. (b) Log scale frequency domain comparisons corresponding to the thru-air (black) and thru-tile (gray) waveforms. The 0.01 to 0.10 THz frequency band used for the transmission image has been highlighted in red.

(a)

(b)