Details
| Original language | English |
|---|---|
| Title of host publication | Ultrafast Processes in Materials Science |
| Pages | 111-116 |
| Number of pages | 6 |
| Publication status | Published - 2010 |
| Event | 2009 MRS Fall Meeting - Boston, United States Duration: 30 Nov 2009 → 4 Dec 2009 |
Publication series
| Name | Materials Research Society Symposium Proceedings |
|---|---|
| Volume | 1230 |
| ISSN (Print) | 0272-9172 |
Abstract
In this work we apply ultrafast time-resolved X-ray diffraction to study the dynamics of coherent acoustic phonons in laser-excited Ge and Au, with the particular goal to clarify the interplay of the electronic and thermal driving forces. For Ge our measurements reveal that the relative strength of the electronic pressure decreases with increasing laser fluence. For larger laser fluences the thermal pressure exceeds the electronic one, and only at low excitation strength the electronic pressure becomes the dominant driving force, as predicted by theory [1]. For the case of Au the data are well described within the established theoretical framework using the known values for those material parameters which determine the laser-induced pressure, namely the energy relaxation time and the electronic and lattice Grüneisen parameters.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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Ultrafast Processes in Materials Science. 2010. p. 111-116 (Materials Research Society Symposium Proceedings; Vol. 1230).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - The role of thermal and electronic pressure in the picosecond acoustic response of femtosecond laser-excited solids
AU - Shymanovich, Uladzimir
AU - Nicoul, Matthieu
AU - Kähle, Stefan
AU - Lu, Wei
AU - Tarasevitch, Alexander
AU - Zhou, Ping
AU - Wietler, Tobias
AU - Von Hoegen, Michael Horn
AU - Von Der Linde, Dietrich
AU - Sokolowski-Tinten, Klaus
PY - 2010
Y1 - 2010
N2 - In this work we apply ultrafast time-resolved X-ray diffraction to study the dynamics of coherent acoustic phonons in laser-excited Ge and Au, with the particular goal to clarify the interplay of the electronic and thermal driving forces. For Ge our measurements reveal that the relative strength of the electronic pressure decreases with increasing laser fluence. For larger laser fluences the thermal pressure exceeds the electronic one, and only at low excitation strength the electronic pressure becomes the dominant driving force, as predicted by theory [1]. For the case of Au the data are well described within the established theoretical framework using the known values for those material parameters which determine the laser-induced pressure, namely the energy relaxation time and the electronic and lattice Grüneisen parameters.
AB - In this work we apply ultrafast time-resolved X-ray diffraction to study the dynamics of coherent acoustic phonons in laser-excited Ge and Au, with the particular goal to clarify the interplay of the electronic and thermal driving forces. For Ge our measurements reveal that the relative strength of the electronic pressure decreases with increasing laser fluence. For larger laser fluences the thermal pressure exceeds the electronic one, and only at low excitation strength the electronic pressure becomes the dominant driving force, as predicted by theory [1]. For the case of Au the data are well described within the established theoretical framework using the known values for those material parameters which determine the laser-induced pressure, namely the energy relaxation time and the electronic and lattice Grüneisen parameters.
UR - http://www.scopus.com/inward/record.url?scp=77957757114&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:77957757114
SN - 9781617387616
T3 - Materials Research Society Symposium Proceedings
SP - 111
EP - 116
BT - Ultrafast Processes in Materials Science
T2 - 2009 MRS Fall Meeting
Y2 - 30 November 2009 through 4 December 2009
ER -