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Diploma thesis abstract Femtosecond nonlinear spectroscopy of molecular aggregates using tools of transient absorption and pump third harmonic generation Author P. V. Mezentsev. Scientific adviser A. M. Zheltikov.
In this paper nonlinear-optical response of J-aggregate has been investigated using technique of transient absorption and pump third harmonic generation. Signals of second harmonic of Cr: forsterite has been used as pump pulse in transient absorption experiments and signal from photonic-crystal fiber has been used as probe signal. The probability of using emission from photonic-crystal fiber for investigation of timedependent nonlinear response of materials has been demonstrated. In analysis of results the response time of J-aggregate has been found out, the energies of exitons levels has obtained and the rising of nonlinear susceptibility of J-aggregate exited levels has been demonstrated.