Third-Order Nonlinear Optical Behavior of Novel Polythiophene Derivatives Functionalized with Disperse Red 19 Chromophore

Figure 5

AFM micrographs of film copolymers (a) P1 and (b) P2 fabricated by drop casting from toluene solutions and (a′) P1 and (b′) P2 prepared by spin coating from chloroform solutions.