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Zinth, Wolfgang and Laubereau, Alfred and Kaiser, Wolfgang (1978): Time resolved observation of resonant and non-resonant contributions to the nonlinear susceptibility χ(3). In: optics communications, No. 26: pp. 457-462
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Abstract

The resonant and nonresonant part of χ(3) are distinguished by their different time behavior. The medium is coherently excited by two picosecond light pulses of defined frequency difference and the state of the system is monitored by a third properly delayed probe pulse. Results are presented on neat liquids of carbontetrachloride and cyclohexane and on the mixture of CCl4: C6H12.