Pump pulse duration dependence of coherent phonon amplitudes in antimony
| Autor: | Oleg V. Misochko |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Solid-state physics Condensed matter physics Phonon Degenerate energy levels General Physics and Astronomy Pulse duration 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Symmetry (physics) Condensed Matter::Materials Science Amplitude Condensed Matter::Superconductivity 0103 physical sciences Femtosecond Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Pulse-width modulation |
| Zdroj: | Journal of Experimental and Theoretical Physics. 123:292-302 |
| ISSN: | 1090-6509 1063-7761 |
| DOI: | 10.1134/s1063776116070116 |
| Popis: | Coherent optical phonons of A 1k and E k symmetry in antimony have been studied using the femtosecond pump–probe technique. By varying the pump-pulse duration and keeping the probe duration constant, it was shown that the amplitude of coherent phonons of both symmetries exponentially decreases with increasing pulse width. It was found that the amplitude decay rate for the fully symmetric phonons with larger frequency is greater than that of the doubly degenerate phonons, whereas the frequency and lifetime for coherent phonons of both symmetries do not depend on the pump-pulse duration. Based on this data, the possibility of separation between dynamic and kinematic contributions to the generation mechanism of coherent phonons is discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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