Laser-induced transient grating setup with continuously tunable period

We present a modification of the laser-induced transient grating setup enabling continuous tuning of the transient grating period. The fine control of the period is accomplished by varying the angle of the diffraction grating used to split excitation and probe beams. The setup has been tested by mea...

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Bibliographic Details
Published in:Review of scientific instruments 2015-12, Vol.86 (12), p.123101-123101
Main Authors: Vega-Flick, A, Eliason, J K, Maznev, A A, Khanolkar, A, Abi Ghanem, M, Boechler, N, Alvarado-Gil, J J, Nelson, K A
Format: Article
Language:English
Subjects:
Beams (radiation)
DIFFRACTION GRATINGS
Engineering Sciences
EXCITATION
GEOMETRY
Gratings (spectra)
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
LASERS
MODIFICATIONS
Physics
Scientific apparatus & instruments
SOUND WAVES
Surface acoustic waves
TRANSMISSION
TUNING
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Summary:We present a modification of the laser-induced transient grating setup enabling continuous tuning of the transient grating period. The fine control of the period is accomplished by varying the angle of the diffraction grating used to split excitation and probe beams. The setup has been tested by measuring dispersion of bulk and surface acoustic waves in both transmission and reflection geometries. The presented modification is fully compatible with optical heterodyne detection and can be easily implemented in any transient grating setup.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4936767