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

✍ Scribed by K.V. Ivanin; A.V. Leontyev; V.S. Lobkov; V.G. Nikiforov; K.M. Salikhov; V.V. Samartsev; G.M. Safiullin

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 100 KB
• Volume: 6
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.200910054

✦ Synopsis

The results of the femtosecond four-wave mixing measurements performed on the CdS crystal at room temperature are reported. The dephasing time T d = 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. Intensity, arb. units 3.0 3.5 2.5 2.0 1.5 1.0 0.5 0 20 0 5 10 15 τ 23 , ps 0.7 μJ 0.6 μJ 0.5 μJ 0.4 μJ Stimulated photon echo decay curves obtained using various excitation pulses energy