Abstract
The polydiacetylene (PDA), poly-[2,4 hexaxadiyne-1,6 diol-bis (p-toluenesul-fonate)] (pTS) has been extensively studied1,2,3,4,5 because of its highly nonlinear optical (NLO) properties. For example, recent z-scan measurements exhibited fifth3,4 and seventh5 order dependencies in both the nonlinear absorption and refraction in single crystals of this material. The present work reports measurements of transient absorption, time- resolved degenerate four-wave mixing (DFWM) and nonlinear transmission (NLT) in pTS using picosecond excitation at wavelengths from 709 nm to 744 nm.
© 1999 Optical Society of America
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