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Open AccessArticle

Self Referencing Heterodyne Transient Grating Spectroscopy with Short Wavelength

1
Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, CA 94025, USA
2
Laboratory of Ultrafast Spectroscopy, EPFL, LausanneCH 1015, Switzerland
3
NIF and Photon Sciences, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
4
IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA
5
SIMES, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, CA 94025, USA
6
Department of Physics, Temple University, Philadelphia, PA 19122, USA
7
Max Planck Institute of Microstructure Physics, Halle D 06120, Germany
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Photonics 2015, 2(2), 392-401; https://doi.org/10.3390/photonics2020392
Received: 16 March 2015 / Revised: 8 April 2015 / Accepted: 8 April 2015 / Published: 15 April 2015
(This article belongs to the Special Issue Extreme UV Lasers: Technologies and Applications)
Heterodyning by a phase stable reference electric field is a well known technique to amplify weak nonlinear signals. For short wavelength, the generation of a reference field in front of the sample is challenging because of a lack of suitable beamsplitters. Here, we use a permanent grating which matches the line spacing of the transient grating for the creation of a phase stable reference field. The relative phase among the two can be changed by a relative translation of the permanent and transient gratings in direction orthogonal to the grating lines. We demonstrate the technique for a transient grating on a VO2 thin film and observe constructive as well as destructive interference signals. View Full-Text
Keywords: transient grating; heterodyne detection; extreme ultraviolet transient grating; heterodyne detection; extreme ultraviolet
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Grilj, J.; Sistrunk, E.; Jeong, J.; Samant, M.G.; Gray, A.X.; Dürr, H.A.; Parkin, S.S.P.; Gühr, M. Self Referencing Heterodyne Transient Grating Spectroscopy with Short Wavelength. Photonics 2015, 2, 392-401.

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