Picosecond X-ray studies of coherent folded phonons in a multiple quantum well
(2005) In Physical Review Letters 94.- Abstract
- Coherent folded acoustic phonons in a multilayered GaSb/InAs epitaxial heterostructure were generated by femtosecond laser pulses and studied by means of ultrafast x-ray diffraction. Coherent phonons excited simultaneously in the fundamental acoustic branch and the first back-folded branch were detected. This represents the first clear evidence for phonon branch folding based directly on the atomic motion to which x-ray diffraction is sensitive. From a comparison of the measured phonon-modulated x-ray reflectivity with simulations, evidence was found for a reduction of the laser penetration depth. This reduction can be explained by the self-modulation of the refractive index due to photogenerated free carriers.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/701738
- author
- Sondhauss, Peter LU ; Larsson, Jörgen LU ; Harbst, Michael LU ; Naylor, G.A. ; Plech, A ; Scheidt, K ; Synnergren, Ola LU ; Wulff, M and Wark, J.S
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 94
- article number
- 125509
- publisher
- American Physical Society
- external identifiers
-
- wos:000228065600040
- scopus:18144378800
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.94.125509
- language
- English
- LU publication?
- yes
- id
- 41b82fda-130e-423f-a4fb-de319449b550 (old id 701738)
- date added to LUP
- 2016-04-04 13:49:38
- date last changed
- 2022-01-30 00:56:38
@article{41b82fda-130e-423f-a4fb-de319449b550, abstract = {{Coherent folded acoustic phonons in a multilayered GaSb/InAs epitaxial heterostructure were generated by femtosecond laser pulses and studied by means of ultrafast x-ray diffraction. Coherent phonons excited simultaneously in the fundamental acoustic branch and the first back-folded branch were detected. This represents the first clear evidence for phonon branch folding based directly on the atomic motion to which x-ray diffraction is sensitive. From a comparison of the measured phonon-modulated x-ray reflectivity with simulations, evidence was found for a reduction of the laser penetration depth. This reduction can be explained by the self-modulation of the refractive index due to photogenerated free carriers.}}, author = {{Sondhauss, Peter and Larsson, Jörgen and Harbst, Michael and Naylor, G.A. and Plech, A and Scheidt, K and Synnergren, Ola and Wulff, M and Wark, J.S}}, issn = {{1079-7114}}, language = {{eng}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Picosecond X-ray studies of coherent folded phonons in a multiple quantum well}}, url = {{https://lup.lub.lu.se/search/files/6214370/2376702.pdf}}, doi = {{10.1103/PhysRevLett.94.125509}}, volume = {{94}}, year = {{2005}}, }