Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2750401
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Energy coupling to coherent phonons in Bi during femtosecond laser-bismuth interaction is investigated using a double-pulse femtosecond pulse train generated from a temporal pulse shaper. It is found that the increase of bismuth temperature is dependent on the separation time between the two laser pulses. Using a numerical fitting, which considers the effect of convolution between the incident pulses and the material response, the measured temperature increases using different pulse-to-pulse separations allow quantitative determination of the amount of laser energy coupled from excited electrons to coherent phonon vibration. (c) 2007 American Institute of Physics.
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