Figure 2.

(Top) Degree of linear polarization in the extinction of vertically and horizontally polarized light through annealed and aligned films of 1 for orientations with rubbing direction vertical (black line) and rotated +45° (red line) with respect to the vertical direction as seen from the source with the layer of 1 directly facing the source. Lines show a fit to the data of eq 2 with pitch = 600 nm. (Middle) Corresponding degree of polarization in reflection measured at 15° angle of incidence. Lines show a fit to the data of eq 4 with pitch = 600 nm. (Bottom) Schematic of the left handed cholesteric arrangement of polymer chains on the alignment layer for three characteristic thicknesses.