Abstract
The polydiacetylene poly-[2,4-hexadiyn-1,6-diol-bis(p-toluene sulfonate)] (PDA PTS) is a prototype 1-D polymer semiconductor with a very strong excitodic absorption peak (α ≃ 106 cm−1) centered at 2 eV. PTS is known to possess a large fast (≃ 2-ps) nonlinear optical response of the resonantly excited excitonic absorption.1,2 This nonlinear response is accounted for by a phase space filling model that describes successfully the optical nonlindarities in GaAs/AIGaAs quantum well structures.3
© 1989 Optical Society of America
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