Observation of coherent optical phonons excited by femtosecond laser radiation in Sb films by ultrafast electron diffraction method
| Autor: | Evgeny A. Ryabov, Oleg V. Misochko, Sergey V. Chekalin, S. A. Aseev, B. N. Mironov, V. O. Kompanets, Anatoly A. Ischenko, Igor V. Kochikov |
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| Rok vydání: | 2017 |
| Předmět: |
Diffraction
Materials science Solid-state physics Phonon Physics::Optics General Physics and Astronomy 02 engineering and technology Laser pumping 01 natural sciences law.invention Condensed Matter::Materials Science Optics law Condensed Matter::Superconductivity 0103 physical sciences 010306 general physics business.industry Ultrafast electron diffraction 021001 nanoscience & nanotechnology Laser Electron diffraction Femtosecond Condensed Matter::Strongly Correlated Electrons Atomic physics 0210 nano-technology business |
| Zdroj: | Journal of Experimental and Theoretical Physics. 124:422-428 |
| ISSN: | 1090-6509 1063-7761 |
| DOI: | 10.1134/s1063776117020145 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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