Resonance laser-plasma excitation of coherent terahertz phonons in the bulk of fluorine-bearing crystals under high-intensity femtosecond laser irradiation
Journal Article
·
· Quantum Electronics (Woodbury, N.Y.)
- International Laser Center, M. V. Lomonosov Moscow State University, Moscow (Russian Federation)
- A M Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
The dynamics of coherent phonons in fluorine-containing crystals was investigated by pump-probe technique in the plasma production regime. Several phonon modes, whose frequencies are overtones of the 0.38-THz fundamental frequency, were simultaneously observed in a lithium fluoride crystal. Phonons with frequencies of 1 and 0.1 THz were discovered in a calcium fluoride crystal and coherent phonons with frequencies of 1 THz and 67 GHz were observed in a barium fluoride crystal. Furthermore, in the latter case the amplitudes of phonon mode oscillations were found to significantly increase 15 ps after laser irradiation. (interaction of laser radiation with matter)
- OSTI ID:
- 22303387
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 8 Vol. 43; ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
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