Ultrafast time response of optical nonlinearity in polysilane polymers

Yang, Lina; Wang, Q. Z.; Ho, P. P.; Dorsinville, R.; Alfano, R. R.; Zou, W. K.; Yang, N. L.
October 1988
Applied Physics Letters;10/3/1988, Vol. 53 Issue 14, p1245
Academic Journal
Ultrafast relaxation kinetics of third-order nonlinear susceptibility χ(3) of polysilane polymers was measured using both the picosecond Kerr gate and forward degenerated four-wave mixing. The relative contributions from various nonlinear decay mechanisms were estimated from the time response. The third-order nonlinear response was measured to be faster than 3 ps arising from electronic mechanism. A slower component is assigned to the refractive index grating due to light pressure.


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