Acoustic monitoring of microplasma formation and filamentation of tightly focused femtosecond laser pulses in silica glass
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, 119991 Moscow (Russian Federation)
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021 (Japan)
Contact acoustic technique has been employed to perform spatially resolved in situ detection of microplasma formation and filamentation of tightly focused femtosecond laser pulses with supercritical pulse powers in bulk dielectrics, via corresponding acoustic emission. Investigation of acoustic generation mechanisms related to the plasma formation and filamentation effects reveals the critical character of the opaque microplasma and provides estimates of its gigapascal-level pressures and energy densities of a few kJ/cm{sup 3}. The acoustic measurement enables real-time in situ monitoring and revealing of basic mechanisms of ionization and filamentation in bulk dielectrics.
- OSTI ID:
- 21120573
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 92; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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