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Temperature Dependence of the Resonant and Nonresonant CARS Signals

Volume 44, Number 8 (Oct. 1990) Page 1381-1385

Kukk, P.; Lohmus, A.; Korppi-Tommola, J.

We have studied the temperature dependence of resonant and nonresonant CARS signals in benzene, in toluene, and in n-alcohol mixtures. A cryostat was constructed to allow cooling of flowing liquids. In nonpolar solvents, the nonresonant background signal does not seem to depend on temperature, while in n-alcohol mixtures an enhancement of the nonlinear CARS signal is observed. Lowering temperature in these solutions enhances detectability of weak impurity lines in the resonant CARS spectrum.