Abstract
The ultrafast third-order nonlinear optical properties of /dimethyl sulfoxide solution are investigated by optical Kerr effect (OKE) and pump–probe techniques with femtosecond pulses. Using as the reference, the third-order susceptibility of the sample solution is obtained as about at a concentration of . The second hyperpolarizability for the sample solution is deduced to be as large as . The dynamic characteristics of the nonlinear optical response and the origins of the OKE signal can be attributed to excited singlet state populations.
© 2009 Optical Society of America
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