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Spatially confined low-power optically pumped ultrafast synchrotron x-ray nanodiffraction.
- Source :
-
The Review of scientific instruments [Rev Sci Instrum] 2015 Aug; Vol. 86 (8), pp. 083904. - Publication Year :
- 2015
-
Abstract
- The combination of ultrafast optical excitation and time-resolved synchrotron x-ray nanodiffraction provides unique insight into the photoinduced dynamics of materials, with the spatial resolution required to probe individual nanostructures or small volumes within heterogeneous materials. Optically excited x-ray nanobeam experiments are challenging because the high total optical power required for experimentally relevant optical fluences leads to mechanical instability due to heating. For a given fluence, tightly focusing the optical excitation reduces the average optical power by more than three orders of magnitude and thus ensures sufficient thermal stability for x-ray nanobeam studies. Delivering optical pulses via a scannable fiber-coupled optical objective provides a well-defined excitation geometry during rotation and translation of the sample and allows the selective excitation of isolated areas within the sample. Experimental studies of the photoinduced lattice dynamics of a 35 nm BiFeO3 thin film on a SrTiO3 substrate demonstrate the potential to excite and probe nanoscale volumes.
Details
- Language :
- English
- ISSN :
- 1089-7623
- Volume :
- 86
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- The Review of scientific instruments
- Publication Type :
- Academic Journal
- Accession number :
- 26329208
- Full Text :
- https://doi.org/10.1063/1.4929436