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 |
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Rok vydání: | 2009 |
Předmět: |
Materials science
Photon Physics and Astronomy (miscellaneous) business.industry Exciton Dephasing Time constant Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Four-wave mixing symbols.namesake Optics Stokes shift Femtosecond symbols Atomic physics business Spectroscopy Instrumentation |
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 |
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