Polarization dependence of transient photoconductivity intrans-polyacetylene

Abstract

We present the results of a series of measurements of the polarization dependence of the transient photoconductive response in both oriented and nonoriented trans-polyacetylene. Our results indicate that in nonoriented samples, the short-time photoconductivity is dominated by intrachain absorption and intrachain transport, while in oriented samples both interchain and intrachain photogeneration (with different absorption depths) of charge carriers are important. In oriented samples the photoconduction due to interchain excitation is slightly larger than that due to intrachain excitation.