Femtosecond four-wave mixing spectroscopy on CdS crystal at room temperature

Autor: Victor G. Nikiforov, A.V. Leontyev, Kev M. Salikhov, Vladimir S. Lobkov, G. M. Safiullin, K. V. Ivanin, Vitaly V. Samartsev
Rok vydání: 2009
Předmět:
Zdroj: Laser Physics Letters. 6:644-646
ISSN: 1612-202X
1612-2011
DOI: 10.1002/lapl.200910054
Popis: The results of the femtosecond four-wave mixing measurements performed on the CdS crystal at room temperature are reported. The dephasing time Td = 180 fs was obtained. The anti-Stokes shift of the primary photon echo spectrum with respect to the excitation spectrum was observed. The some peculiarities of the coherent responses decay curves indicate that this optical dephasing is due to the exciton-exciton interaction. The stimulated photon echo decay curves appear to have a fast decay component (the time constant of approximately 4.5 ps) in case the energy of exciting pulses exceeds the threshold value of 0.4 μJ.
Databáze: OpenAIRE