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Picosecond x-ray studies of coherent folded acoustic phonons in a periodic semiconductor heterostructure

Sondhauss, Peter LU ; Larsson, Jörgen LU ; Harbst, Michael LU ; Naylor, Graham; Plech, Anton; Scheidt, Kees-Bertus; Synnergren, Ola LU ; Wulff, Michael and Wark, Justin (2006) Ultrafast Phenomena in Semiconductors and Nanostructure Materials X 6118. p.1180-1180
Abstract
Zone folded coherent acoustic phonons were generated in a multilayered GaSb/InAs epitaxial heterostructure via rapid heating by femtosecond laser pulses. These phonons were probed by means of ultrafast x-ray diffraction. Phonons both from 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 absorption index due to photogenerated free carriers.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Zone-folded phonons, Time resolved X-ray diffraction, Coherent phonons
host publication
Proceedings of SPIE - The International Society for Optical Engineering
volume
6118
pages
1180 - 1180
publisher
International Society for Optical Engineering
conference name
Ultrafast Phenomena in Semiconductors and Nanostructure Materials X
conference location
San Jose, CA, United States
conference dates
2006-01-23 - 2006-01-25
external identifiers
  • wos:000237251300029
  • scopus:33646704979
ISSN
0277-786X
1996-756X
DOI
10.1117/12.641144
language
English
LU publication?
yes
id
77cbee04-fb42-400b-bd6c-780b0dce4a88 (old id 617172)
date added to LUP
2007-11-24 12:44:24
date last changed
2019-02-20 03:43:04
@inproceedings{77cbee04-fb42-400b-bd6c-780b0dce4a88,
  abstract     = {Zone folded coherent acoustic phonons were generated in a multilayered GaSb/InAs epitaxial heterostructure via rapid heating by femtosecond laser pulses. These phonons were probed by means of ultrafast x-ray diffraction. Phonons both from 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 absorption index due to photogenerated free carriers.},
  author       = {Sondhauss, Peter and Larsson, Jörgen and Harbst, Michael and Naylor, Graham and Plech, Anton and Scheidt, Kees-Bertus and Synnergren, Ola and Wulff, Michael and Wark, Justin},
  issn         = {0277-786X},
  keyword      = {Zone-folded phonons,Time resolved X-ray diffraction,Coherent phonons},
  language     = {eng},
  location     = {San Jose, CA, United States},
  pages        = {1180--1180},
  publisher    = {International Society for Optical Engineering},
  title        = {Picosecond x-ray studies of coherent folded acoustic phonons in a periodic semiconductor heterostructure},
  url          = {http://dx.doi.org/10.1117/12.641144},
  volume       = {6118},
  year         = {2006},
}