Generation of coherent phonons by coherent extreme ultraviolet radiation in a transient grating experiment
Name
2018-Maznev-ApplPhysLett113.221905-1.5048023.pdf
Description
Published version
Size
1.25 MB
Format
Adobe PDF
Checksum (MD5)
a6fde507c4342b000d78b67353fd2b21
Author(s)
Maznev, A. A.
Bencivenga, F.
Cannizzo, A.
Capotondi, F.
Cucini, R.
Duncan, R. A.
Feurer, T.
Frazer, T. D.
Foglia, L.
Frey, H.-M.
Date Issued
November 2018
Journal
Applied Physics Letters
Publisher
AIP Publishing
Citation
Maznev, A. A. et al. "Generation of coherent phonons by coherent extreme ultraviolet radiation in a transient grating experiment." Applied Physics Letters 113, 22 (November 2018): 221905 © 2018 Author(s)
Version
Final published version
Abstract
We investigate the excitation of coherent acoustic and optical phonons by ultrashort extreme ultraviolet (EUV) pulses produced by a free electron laser. Two crossed femtosecond EUV (wavelength 12.7 nm) pulses are used to excite coherent phonons at a wavelength of 280 nm, which are detected via diffraction of an optical probe beam. Longitudinal and surface acoustic waves are measured in BK-7 glass, diamond, and Bi4Ge3O12; in the latter material, the excitation of a coherent optical phonon mode is also observed. We discuss probing different acoustic modes in reflection and transmission geometries and frequency mixing of surface and bulk acoustic waves in the signal. The use of extreme ultraviolet radiation will allow the creation of tunable GHz to THz acoustic sources in any material without the need to fabricate transducer structures.
Subjects
Physics and Astronomy (miscellaneous)
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1063/1.5048023
