Abstract
Transient energy transfer effect might occur in femtosecond pump–probe optical Kerr gate (OKG) measurements. Using time- and frequency-resolved two-dimensional pump–probe imaging spectroscopy, we are able to obtain the OKG spectra as a function of the delay time between pump and probe pulses. By analyzing the pump power dependence of the OKG spectra at different delay time, we find that due to the effect of transient energy transfer, the short-wavelength components of the OKG spectra are enhanced when the delay of the probe to pump pulse is positive, while the long-wavelength components increase when the delay is negative.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos. 61235003, 11474078 and 11674260), the Natural Science Basic Research Plan in Shaanxi Province of China (Program No. 2014JQ1024), the Research Fund for the Doctoral Program of Higher Education (Grant No. 20130201120025), and the Collaborative Innovation Center of Suzhou Nano Science and Technology.
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Yue, M., Si, J., Yan, L. et al. Time- and frequency-resolved determination of ultrafast energy transfer in optical Kerr measurements. Appl. Phys. B 123, 53 (2017). https://doi.org/10.1007/s00340-016-6629-z
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DOI: https://doi.org/10.1007/s00340-016-6629-z