Nanoscale transient gratings excited and probed by extreme ultraviolet femtosecond pulses
Name
eaaw5805.full.pdf
Description
Published version
Size
471.13 KB
Format
Adobe PDF
Checksum (MD5)
c3740a3cf80bc2f5c2fa00757e9b7c3e
Author(s)
Bencivenga, F.
Mincigrucci, R.
Capotondi, F.
Foglia, L.
Naumenko, D.
Maznev, Alexei
Pedersoli, E.
Simoncig, A.
Caporaletti, F.
Chiloyan, Vazrik
Date Issued
July 26, 2019
Journal
Science Advances
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Bencivenga, F. et al. "Nanoscale transient gratings excited and probed by extreme ultraviolet femtosecond pulses." Science Advances 5, 7 (July 2019): eaaw5805 © 2019 The Author(s)
Version
Final published version
Abstract
Advances in developing ultrafast coherent sources operating at extreme ultraviolet (EUV) and x-ray wavelengths allow the extension of nonlinear optical techniques to shorter wavelengths. Here, we describe EUV transient grating spectroscopy, in which two crossed femtosecond EUV pulses produce spatially periodic nanoscale excitations in the sample and their dynamics is probed via diffraction of a third time-delayed EUV pulse. The use of radiation with wavelengths down to 13.3 nm allowed us to produce transient gratings with periods as short as 28 nm and observe thermal and coherent phonon dynamics in crystalline silicon and amorphous silicon nitride. This approach allows measurements of thermal transport on the ~10-nm scale, where the two samples show different heat transport regimes, and can be applied to study other phenomena showing nontrivial behaviors at the nanoscale, such as structural relaxations in complex liquids and ultrafast magnetic dynamics.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Lincoln Laboratory
Terms of Use
Creative Commons Attribution NonCommercial License 4.0
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1126/sciadv.aaw5805
