Journal
APPLIED PHYSICS LETTERS
Volume 81, Issue 15, Pages 2791-2793Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1512821
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Ultrashort pulse laser techniques have been used to observe and characterize the generation of coherent phonons by rapid screening of strain-induced piezoelectric polarization fields in AlGaN/GaN multilayers. The results are compared with those where coherent phonons are launched by optical techniques without the carrier injections process to show consistency with the anticipated longitudinal phonon dispersion in the nitride semiconductor samples. (C) 2002 American Institute of Physics.
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