267564.fig.001a
(a)
267564.fig.001b
(b)
267564.fig.001c
(c)
Figure 1: (a) The real (top panel) and the imaginary (bottom panel) parts of the dielectric function of TGS; the monoclinic -axis is along the “perpendicular” ( ) direction. (b) Same for sapphire; the crystallographic -axis is along the “perpendicular” ( ) direction. (c) Same for monocrystalline Bismuth.