Stimulated Low-Frequency Raman Scattering in LaF3 Suspensions

We observe stimulated low-frequency Raman scattering (SLFRS) caused by laser pulse interaction with acoustic vibrations of nanoparticles in water suspensions of LaF 3 nanoparticles. We show that frequency shifts of the scattering correspond to the eigenfrequencies of nanoparticles vibrations. LaF 3...

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Bibliographic Details
Published in:Journal of Russian laser research 2018-05, Vol.39 (3), p.294-301
Main Authors: Safronikhin, A. V., Ehrlich, H. V., Lisichkin, G. V., Kudriavtseva, A. D., Mironova, T. V., Shevchenko, M. A., Strokov, M. A., Tcherniega, N. V., Zemskov, K. I.
Format: Article
Language:English
Subjects:
Glycine
Lanthanum fluorides
Lasers
Microwaves
Morphology
Nanoparticles
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Raman spectra
Reagents
Resonant frequencies
RF and Optical Engineering
Spectrum analysis
Transmission electron microscopy
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Summary:We observe stimulated low-frequency Raman scattering (SLFRS) caused by laser pulse interaction with acoustic vibrations of nanoparticles in water suspensions of LaF 3 nanoparticles. We show that frequency shifts of the scattering correspond to the eigenfrequencies of nanoparticles vibrations. LaF 3 nanoparticles were synthesized in the presence of glycine by a double jet precipitation technique at various initial concentrations of reagents. We investigate the morphologies and particle sizes as well as size distributions of the particles prepared using transmission electron microscopy (TEM) and dynamical light scattering (DLS). In view of the absorption spectroscopy, we show that the reaction system components and products have no absorption in the visible region, including λ = 694 . 3 nm. From the luminescence spectroscopy, we find also that they do not emit at λ = 694 . 3 nm excitation.
ISSN:1071-2836
1573-8760
DOI:10.1007/s10946-018-9721-5