Ultrafast spectroscopy of CdS/CdSe quantum dots |
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| Authors: | A G Shmelev A V Leontyev D K Zharkov V G Nikiforov V S Lobkov V V Samartsev |
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| Institution: | 1.Zavoisky Physical-Technical Institute, Kazan Scientific Center,Russian Academy of Sciences,Kazan,Russia;2.Kazan Federal University,Kazan,Russia |
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| Abstract: | Results from the nonresonance spectroscopy of CdS/CdSe quantum dots (composites of CdSe–CdS nanoparticles (core–shell)) are presented. The nonlinear optical properties of CdS/CdSe QDs in PMMA are studied with fs pulses at 1053 nm using the transient lens technique. QDs generate rapidly oscillating signals with amplitude rise times of around 200 fs and decay times of around 500 fs, while pure PMMA polymer only generates an oscillating signal whose envelope coincides with its autocorrelation function. |
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