3RD-ORDER NONLINEAR OPTICAL-PROPERTIES OF POLY(DIPHENYL AMINE) AND POLY(4-AMINO BIPHENYL), NOVEL PROCESSIBLE CONDUCTING POLYMERS

Off-resonant third-order nonlinear optical susceptibilities using degenerate four-wave mixing measurements in solution at 1.064-mu-m are reported for partially doped states of the soluble, stable, reprocessible conducting polymers poly(4-amino biphenyl) [P(4ABP)] and poly(diphenyl amine) [P(DPA)] whose synthesis and properties were reported earlier. The polymers show appreciable nonlinearities, chi-xxxx(3) being (1.4 +/- 0.3) X 10(-10) esu for P(4ABP) and (1.3 +/- 0.3) X 10(-10) esu for P(DPA), with a time response faster than 40 ps.