Dynamics of plasma production and development in gases and transparent solids irradiated by high-intensity, tightly focused picosecond laser pulses
| Autor: | Sergei V Garnov, O. G. Tsarkova, Vitali I. Konov, Friedrich Dausinger, A A Malyutin, I S Yatskovskii |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Electron density
Materials science Statistical and Nonlinear Physics Plasma Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention law Picosecond Temporal resolution Irradiation Electrical and Electronic Engineering Atomic physics Refractive index Ultrashort pulse |
| Zdroj: | Quantum Electronics. 33:758-764 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe2003v033n09abeh002497 |
| Popis: | The results of experimental studies of the dynamics of formation and development of a laser plasma produced in microvolumes of gases (air) and transparent solids (fused silica) by high-intensity [I(1-2)×1014 W cm-2], ~22-ps, 539-nm laser pulses tightly focused in a region of diameter 4 μm are presented. The spatiotemporal distributions of the refractive index and the electron density are studied by the interferometric method with a spatial resolution of ~1.6 μm and a temporal resolution of ~3 ps directly during the action of excitation picosecond laser pulses. An almost complete ionisation of the initial gas was shown to occur even in the initial stage of air plasma formation, within a few picoseconds after plasma production. The irradiation of solid transparent dielectrics (fused silica) by picosecond laser pulses resulted in a reversible production of a plasma with an electron density above 1020 cm-3, which did not cause the damage of dielectrics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|