Gouy phase shift of single-cycle picosecond acoustic pulses

Holme, N. C. R.; Daly, B. C.; Myaing, M. T.; Norris, T. B.
July 2003
Applied Physics Letters;7/14/2003, Vol. 83 Issue 2, p392
Academic Journal
Ultrafast laser pulses are used to generate single-cycle picosecond acoustic pulses in thin metal films on silicon. For small initial excitation spot sizes, propagation of the acoustic pulses across a 485-μm Si crystal leads to significant diffraction effects. The temporal reshaping of the acoustic wave form due to diffraction is investigated, and we demonstrate that the acoustic far field can be reached.


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