Published in
American Institute of Physics, Applied Physics Letters, 19(100), p. 191903
DOI: 10.1063/1.4711045
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Generation of acoustic pulses from a photo-acoustic transducer measured by time-resolved x-ray diffraction
Journal article published in 2012 by
Yuan Gao 
,
Matthew F. DeCamp
,
Matthew F. DeCamp
This paper was not found in any repository, but could be made available legally by the author.
Full text: Unavailable
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Abstract
Picosecond acoustic pulses generated by ultrafast optical excitation of a 100 nm gold photo-acoustic transducer deposited on a germanium substrate are observed using time-resolved x-ray diffraction. The resulting pump-probe spectra reveal that the spatiotemporal structure of the acoustic pulse is bipolar with acoustic wavevectors up to inverse of the film thickness.