Probing Unfolded Acoustic Phonons with X Rays Export

@article{citeulike:3018257, abstract = {Ultrafast laser excitation of an InGaAs/InAlAs superlattice (SL) creates coherent folded acoustic phonons that subsequently leak into the bulk (InP) substrate. Upon transmission, the phonons become \“unfolded\” into bulk modes and acquire a wave vector much larger than that of the light. We show that time-resolved x-ray diffraction is sensitive to this large-wave vector excitation in the substrate. Comparison with dynamical diffraction simulations of propagating strain supports our interpretation.}, author = {Trigo, M. and Sheu, Y. M. and Arms, D. A. and Chen, J. and Ghimire, S. and Goldman, R. S. and Landahl, E. and Merlin, R. and Peterson, E. and Reason, M. and Reis, D. A.}, citeulike-article-id = {3018257}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000101000002025505000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRL/v101/e025505}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevLett.101.025505}, doi = {10.1103/PhysRevLett.101.025505}, journal = {Physical Review Letters}, keywords = {acoustic, phonon, physics, xray}, number = {2}, posted-at = {2008-07-18 14:40:29}, priority = {2}, publisher = {APS}, title = {Probing Unfolded Acoustic Phonons with X Rays}, url = {http://dx.doi.org/10.1103/PhysRevLett.101.025505}, volume = {101}, year = {2008} }

TY - JOUR ID - citeulike:3018257 L3 - citeulike-article-id:3018257 N2 - Ultrafast laser excitation of an InGaAs/InAlAs superlattice (SL) creates coherent folded acoustic phonons that subsequently leak into the bulk (InP) substrate. Upon transmission, the phonons become “unfolded” into bulk modes and acquire a wave vector much larger than that of the light. We show that time-resolved x-ray diffraction is sensitive to this large-wave vector excitation in the substrate. Comparison with dynamical diffraction simulations of propagating strain supports our interpretation. IS - 2 JF - Physical Review Letters TI - Probing Unfolded Acoustic Phonons with X Rays PB - APS VL - 101 KW - acoustic KW - phonon KW - physics KW - xray AU - Trigo, M AU - Sheu, YM AU - Arms, DA AU - Chen, J AU - Ghimire, S AU - Goldman, RS AU - Landahl, E AU - Merlin, R AU - Peterson, E AU - Reason, M AU - Reis, DA PY - 2008/// UR - http://dx.doi.org/10.1103/PhysRevLett.101.025505 ER -