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Sum-frequency ionic Raman scattering

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons39359

Mährlein,  Sebastian
Physical Chemistry, Fritz Haber Institute, Max Planck Society;
Department of Chemistry, Columbia University;

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Volltexte (frei zugänglich)

1801.05987.pdf
(Preprint), 2MB

PhysRevB.97.174302.pdf
(Verlagsversion), 863KB

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Zitation

Juraschek, D. M., & Mährlein, S. (2018). Sum-frequency ionic Raman scattering. Physical Review B, 97(17): 174302. Retrieved from http://arxiv.org/abs/1801.05987.


Zitierlink: http://hdl.handle.net/21.11116/0000-0000-34F8-E
Zusammenfassung
In a recent report sum-frequency excitation of a Raman-active phonon was experimentally demonstrated for the first time. This mechanism is the sibling of impulsive stimulated Raman scattering, in which difference-frequency components of a light field excite a Raman-active mode. Here we propose that ionic Raman scattering analogously has a sum-frequency counterpart. We compare the four Raman mechanisms, photonic and ionic difference- and sum-frequency excitation, for three different example materials using a generalized oscillator model for which we calculate the parameters with density functional theory. Sum-frequency ionic Raman scattering completes the toolkit for controlling materials properties by means of selective excitation of lattice vibrations.