684349.fig.077a
(a)
684349.fig.077b
(b)
Figure 77: Diffraction efficiency as a function of incident angle for (a) - and (b) -polarized light. The data is for an H-PDLC transmission grating with Λ 0.5 μm probed at 632.8 nm. The grating thickness is about 10 μm. A fit to coupled-wave theory yields (a) = 0.054 ( -polarization) and (b) = 0.019 ( -polarization).