Abstract
Organic materials are widely recognized as good nonlinear-optical materials. For future applications, such as all-optical switching, third-order nonlinearities of novel materials must be determined. A particularly important quantity is the imaginary part of the third-order hyperpolarizability, which is responsible for two-photon absorption and hence for losses in possible applications. A useful instrument for investigating real and imaginary parts of the nonlinear hyper polarizability is the phase-conjugate interferometer.
© 1994 Optical Society of America
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