Generation and Propagation of a Picosecond Acoustic Pulse at a Buried Interface: Time-Resolved X-Ray Diffraction Measurements
Abstract
We report on the propagation of coherent acoustic wave packets in (001) surface oriented Al{sub 0.3}Ga{sub 0.7}As/GaAs heterostructure, generated through localized femtosecond photoexcitation of the GaAs. Transient structural changes in both the substrate and film are measured with picosecond time-resolved x-ray diffraction. The data indicate an elastic response consisting of unipolar compression pulses of a few hundred picosecond duration traveling along [001] and [001] directions that are produced by predominately impulsive stress. The transmission and reflection of the strain pulses are in agreement with an acoustic mismatch model of the heterostructure and free-space interfaces.
- Authors:
-
- FOCUS Center and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)
- Department of Material Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States)
- Publication Date:
- OSTI Identifier:
- 20699682
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 24; Other Information: DOI: 10.1103/PhysRevLett.95.246104; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; ALUMINIUM COMPOUNDS; COMPRESSION; FILMS; GALLIUM ARSENIDES; HETEROJUNCTIONS; INTERFACES; PULSES; SEMICONDUCTOR MATERIALS; SOUND WAVES; STRAINS; STRESSES; SUBSTRATES; TIME RESOLUTION; TRANSIENTS; TRANSMISSION; WAVE PROPAGATION; X-RAY DIFFRACTION
Citation Formats
Lee, S H, Cavalieri, A L, Fritz, D M, Swan, M C, Reis, D A, Hegde, R S, Reason, M, and Goldman, R S. Generation and Propagation of a Picosecond Acoustic Pulse at a Buried Interface: Time-Resolved X-Ray Diffraction Measurements. United States: N. p., 2005.
Web. doi:10.1103/PhysRevLett.95.246104.
Lee, S H, Cavalieri, A L, Fritz, D M, Swan, M C, Reis, D A, Hegde, R S, Reason, M, & Goldman, R S. Generation and Propagation of a Picosecond Acoustic Pulse at a Buried Interface: Time-Resolved X-Ray Diffraction Measurements. United States. https://doi.org/10.1103/PhysRevLett.95.246104
Lee, S H, Cavalieri, A L, Fritz, D M, Swan, M C, Reis, D A, Hegde, R S, Reason, M, and Goldman, R S. 2005.
"Generation and Propagation of a Picosecond Acoustic Pulse at a Buried Interface: Time-Resolved X-Ray Diffraction Measurements". United States. https://doi.org/10.1103/PhysRevLett.95.246104.
@article{osti_20699682,
title = {Generation and Propagation of a Picosecond Acoustic Pulse at a Buried Interface: Time-Resolved X-Ray Diffraction Measurements},
author = {Lee, S H and Cavalieri, A L and Fritz, D M and Swan, M C and Reis, D A and Hegde, R S and Reason, M and Goldman, R S},
abstractNote = {We report on the propagation of coherent acoustic wave packets in (001) surface oriented Al{sub 0.3}Ga{sub 0.7}As/GaAs heterostructure, generated through localized femtosecond photoexcitation of the GaAs. Transient structural changes in both the substrate and film are measured with picosecond time-resolved x-ray diffraction. The data indicate an elastic response consisting of unipolar compression pulses of a few hundred picosecond duration traveling along [001] and [001] directions that are produced by predominately impulsive stress. The transmission and reflection of the strain pulses are in agreement with an acoustic mismatch model of the heterostructure and free-space interfaces.},
doi = {10.1103/PhysRevLett.95.246104},
url = {https://www.osti.gov/biblio/20699682},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 24,
volume = 95,
place = {United States},
year = {Fri Dec 09 00:00:00 EST 2005},
month = {Fri Dec 09 00:00:00 EST 2005}
}
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