Influence of the absorbed optical quanta energy on GHz ultrasound generation in GaAsE. Morozov, Y. Laamiri, P. Ruello, D. Mounier and V. E. GusevEur. Phys. J. Special Topics, 153 (2008) 239-241DOI: https://doi.org/10.1140/epjst/e2008-00435-3