Figure 1.

(Top) Chemical structure of the polymer 1. (Middle) Schematic of the direction of the polyimide alignment layer and the orientation of the transition dipole moments of the π-conjugated polymer chains in a thin film of annealed polymer. (Bottom) linear dichroism in transmission and reflection for thermally annealed film of 1 on rubbed polyimide with the rubbing direction vertical (left) and rotated over +45° (right) as seen from the light source with the layer of conjugated polymer directly facing the viewer. Thickness of the layer of 1: d = 24 nm.