Probing Unfolded Acoustic Phonons with X Rays
作者： M. Trigo , Y. M. Sheu , D. A. Arms , J. Chen , S. Ghimire
DOI: 10.1103/PHYSREVLETT.101.025505
关键词: Laser 、 Excitation 、 Optics 、 Transmission (telecommunications) 、 Molecular physics 、 Substrate (electronics) 、 Phonon 、 Ultrashort pulse 、 Diffraction 、 Superlattice 、 Physics 、 General Physics and Astronomy
摘要: Ultrafast laser excitation of an InGaAs/InAlAs superlattice (SL) creates coherent folded acoustic phonons that subsequently leak into the bulk (InP) substrate. Upon transmission, become "unfolded" modes and acquire a wave vector much larger than light. We show time-resolved x-ray diffraction is sensitive to this large-wave in Comparison with dynamical simulations propagating strain supports our interpretation.
harvard.edu
sci-hub.se 参考文章(16)
J. K. Wahlstrand, T. A. Eckhause, R. Merlin, R. S. Goldman, M. Reason, M. Trigo, Ultrafast optical generation and remote detection of terahertz sound using semiconductor superlattices Applied Physics Letters. ,vol. 91, pp. 023115- ,(2007) , 10.1063/1.2754353
Light Scattering in Solids VII lss4. ,vol. 54, ,(1982) , 10.1007/3-540-11942-6
R. Merlin, Generating coherent THz phonons with light pulses Solid State Communications. ,vol. 102, pp. 207- 220 ,(1997) , 10.1016/S0038-1098(96)00721-1
C. Rossignol, J. M. Rampnoux, M. Perton, B. Audoin, S. Dilhaire, Generation and detection of shear acoustic waves in metal submicrometric films with ultrashort laser pulses. Physical Review Letters. ,vol. 94, pp. 166106- ,(2005) , 10.1103/PHYSREVLETT.94.166106
S. H. Lee, A. L. Cavalieri, D. M. Fritz, M. C. Swan, R. S. Hegde, M. Reason, R. S. Goldman, D. A. Reis, Generation and Propagation of a Picosecond Acoustic Pulse at a Buried Interface: Time-Resolved X-Ray Diffraction Measurements Physical Review Letters. ,vol. 95, pp. 246104- ,(2005) , 10.1103/PHYSREVLETT.95.246104
D. B. McWhan, P. Hu, M. A. Chin, V. Narayanamurti, Observation of optically excited near-zone-edge phonons in GaAs by diffuse x-ray scattering Physical Review B. ,vol. 26, pp. 4774- 4776 ,(1982) , 10.1103/PHYSREVB.26.4774
P. Sondhauss, J. Larsson, M. Harbst, G. A. Naylor, A. Plech, K. Scheidt, O. Synnergren, M. Wulff, J. S. Wark, Picosecond x-ray studies of coherent folded acoustic phonons in a multiple quantum well. Physical Review Letters. ,vol. 94, pp. 125509- ,(2005) , 10.1103/PHYSREVLETT.94.125509
M. Bargheer, N. Zhavoronkov, Y. Gritsai, J. C. Woo, D. S. Kim, M. Woerner, T. Elsaesser, Coherent atomic motions in a nanostructure studied by femtosecond X-ray diffraction. Science. ,vol. 306, pp. 1771- 1773 ,(2004) , 10.1126/SCIENCE.1104739
B. C. Daly, N. C. R. Holme, T. Buma, C. Branciard, T. B. Norris, D. M. Tennant, J. A. Taylor, J. E. Bower, S. Pau, Imaging nanostructures with coherent phonon pulses Applied Physics Letters. ,vol. 84, pp. 5180- 5182 ,(2004) , 10.1063/1.1764599
C. R. Wie, H. M. Kim, Kinematical x‐ray diffraction model with a new boundary condition for analysis of Bragg‐peak profiles of layered crystals Journal of Applied Physics. ,vol. 69, pp. 6406- 6412 ,(1991) , 10.1063/1.348844