Abstract
The generation of coherent optical phonons in a polycrystalline antimony film sample has been investigated using femtosecond electron diffraction method. Phonon vibrations have been induced in the Sb sample by the main harmonic of a femtosecond Ti:Sa laser (λ = 800 nm) and probed by a pulsed ultrashort photoelectron beam synchronized with the pump laser. The diffraction patterns recorded at different times relative to the pump laser pulse display oscillations of electron diffraction intensity corresponding to the frequencies of vibrations of optical phonons: totally symmetric (A 1g ) and twofold degenerate (E g ) phonon modes. The frequencies that correspond to combinations of these phonon modes in the Sb sample have also been experimentally observed.
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Original Russian Text © B.N. Mironov, V.O. Kompanets, S.A. Aseev, A.A. Ischenko, I.V. Kochikov, O.V. Misochko, S.V. Chekalin, E.A. Ryabov, 2017, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2017, Vol. 151, No. 3, pp. 494–502.
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Mironov, B.N., Kompanets, V.O., Aseev, S.A. et al. Observation of coherent optical phonons excited by femtosecond laser radiation in Sb films by ultrafast electron diffraction method. J. Exp. Theor. Phys. 124, 422–428 (2017). https://doi.org/10.1134/S1063776117020145
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DOI: https://doi.org/10.1134/S1063776117020145