Journal
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
Volume 124, Issue 3, Pages 422-428Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1063776117020145
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- Russian Foundation for Basic Research [14-22-02035 ofi_m, 16-29-11679 ofi_m]
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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 (lambda = 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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