Transient strain driven by a dense electron-hole plasma
DeCamp, Matthew F.; Reis, David A.; Cavalieri, A; Bucksbaum, Philip H.; Clarke, Roy; Merlin, Roberto; Dufresne, E. M.; Arms, D. A.; Lindenberg, Aaron M.; MacPhee, A. G.; Chang, Zenghu; Lings, B.; Wark, Justin S.; Fahy, Stephen B.
Date:
2003
Copyright:
© 2003, American Physical Society
Citation:
DeCamp, M. F., Reis, D. A., Cavalieri, A., Bucksbaum, P. H., Clarke, R., Merlin, R., Dufresne, E. M., Arms, D. A., Lindenberg, A. M., MacPhee, A. G., Chang, Z., Lings, B., Wark, J. S. and Fahy, S. (2003) 'Transient strain driven by a dense electron-hole plasma', Physical Review Letters, 91(16), 165502 (4pp). doi: 10.1103/PhysRevLett.91.165502
Abstract:
We measure transient strain in ultrafast laser-excited Ge by time-resolved x-ray anomalous transmission. The development of the coherent strain pulse is dominated by rapid ambipolar diffusion. This pulse extends considerably longer than the laser penetration depth because the plasma initially propagates faster than the acoustic modes. X-ray diffraction simulations are in agreement with the observed dynamics.
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