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(a) Measured time-domain THz signals reflected from points marked on LI, GS, FS (Fig. 2(a)), and water. Analysis of water was used to verify the presence of secondary THz signals reflected from internal interfaces within samples. The inset shows an expanded time window (23 to 28 ps). (b) Measured THz spectra of (a). (c)-(e) H & E stained photographs of LI, GS, and FS, respectively.
