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Title: Formation and development dynamics of femtosecond laser microplasma in gases

Abstract

We report our experimental investigations of the formation and development dynamics of laser plasma produced in gas microvolumes (microplasma) upon multiple ionisation by tightly focused (to a spot 2-3 {mu}m in diameter) high-intensity (up to {approx}10{sup 17} W cm{sup -2}) femtosecond pulses of a Ti:sapphire laser ({tau}{sub p} {approx_equal} 130 fs, {lambda} = 800 nm). Precision interferometric measurements (with a spatial resolution of {approx}1.5 {mu}m) were made of the spatiotemporal distribution of the refractive index and electron density in the microplasmas of the air and helium immediately during the action of the exciting femtosecond laser pulse and at the initial stage of free plasma expansion. The microplasma formation was shown to occur as a result of almost complete (up to bare nuclei) ionisation of the initial gas. For the first time the spectral continuum and the dynamics of spectral line formation in the UV and visible spectral ranges were investigated with a picosecond time resolution for the femtosecond laser-produced microplasmas of the air, N{sub 2}, Ar, and He at normal conditions. For the first time the generation of the second (even) laser radiation harmonic was recorded in a femtosecond subcritical-density plasma of gases. (special issue devoted to the 90th anniversarymore » of a.m. prokhorov)« less

Authors:
; ; ; ; ; ;
Publication Date:
OSTI Identifier:
21466551
Resource Type:
Journal Article
Journal Name:
Quantum Electronics (Woodbury, N.Y.)
Additional Journal Information:
Journal Volume: 36; Journal Issue: 7; Other Information: DOI: 10.1070/QE2006v036n07ABEH013173; Journal ID: ISSN 1063-7818
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCURACY; AIR; ELECTRON DENSITY; HELIUM; IONIZATION; LASER RADIATION; PLASMA DENSITY; PLASMA EXPANSION; PULSES; REFRACTIVE INDEX; SAPPHIRE; SPATIAL DISTRIBUTION; SPATIAL RESOLUTION; TIME RESOLUTION; CORUNDUM; DISTRIBUTION; ELECTROMAGNETIC RADIATION; ELEMENTS; EXPANSION; FLUIDS; GASES; MINERALS; NONMETALS; OPTICAL PROPERTIES; OXIDE MINERALS; PHYSICAL PROPERTIES; RADIATIONS; RARE GASES; RESOLUTION; TIMING PROPERTIES

Citation Formats

Bukin, V V, Vorob'ev, Nikolai S, Garnov, Sergei V, Konov, Vitalii I, Lozovoi, V I, Malyutin, A A, Shchelev, M Ya, and Yatskovskii, I S, E-mail: vbkn@kapella.gpi.r, E-mail: vor@kapella.gpi.r, E-mail: garnov@kapella.gpi.r, E-mail: vik@nsc.gpi.r, E-mail: evi@ran.gpi.r, E-mail: amal@kapella.gpi.r, E-mail: m.schelev@ran.gpi.r, E-mail: yatskov@kapella.gpi.r. Formation and development dynamics of femtosecond laser microplasma in gases. United States: N. p., 2006. Web. doi:10.1070/QE2006V036N07ABEH013173.
Bukin, V V, Vorob'ev, Nikolai S, Garnov, Sergei V, Konov, Vitalii I, Lozovoi, V I, Malyutin, A A, Shchelev, M Ya, & Yatskovskii, I S, E-mail: vbkn@kapella.gpi.r, E-mail: vor@kapella.gpi.r, E-mail: garnov@kapella.gpi.r, E-mail: vik@nsc.gpi.r, E-mail: evi@ran.gpi.r, E-mail: amal@kapella.gpi.r, E-mail: m.schelev@ran.gpi.r, E-mail: yatskov@kapella.gpi.r. Formation and development dynamics of femtosecond laser microplasma in gases. United States. doi:10.1070/QE2006V036N07ABEH013173.
Bukin, V V, Vorob'ev, Nikolai S, Garnov, Sergei V, Konov, Vitalii I, Lozovoi, V I, Malyutin, A A, Shchelev, M Ya, and Yatskovskii, I S, E-mail: vbkn@kapella.gpi.r, E-mail: vor@kapella.gpi.r, E-mail: garnov@kapella.gpi.r, E-mail: vik@nsc.gpi.r, E-mail: evi@ran.gpi.r, E-mail: amal@kapella.gpi.r, E-mail: m.schelev@ran.gpi.r, E-mail: yatskov@kapella.gpi.r. Mon . "Formation and development dynamics of femtosecond laser microplasma in gases". United States. doi:10.1070/QE2006V036N07ABEH013173.
@article{osti_21466551,
title = {Formation and development dynamics of femtosecond laser microplasma in gases},
author = {Bukin, V V and Vorob'ev, Nikolai S and Garnov, Sergei V and Konov, Vitalii I and Lozovoi, V I and Malyutin, A A and Shchelev, M Ya and Yatskovskii, I S, E-mail: vbkn@kapella.gpi.r, E-mail: vor@kapella.gpi.r, E-mail: garnov@kapella.gpi.r, E-mail: vik@nsc.gpi.r, E-mail: evi@ran.gpi.r, E-mail: amal@kapella.gpi.r, E-mail: m.schelev@ran.gpi.r, E-mail: yatskov@kapella.gpi.r},
abstractNote = {We report our experimental investigations of the formation and development dynamics of laser plasma produced in gas microvolumes (microplasma) upon multiple ionisation by tightly focused (to a spot 2-3 {mu}m in diameter) high-intensity (up to {approx}10{sup 17} W cm{sup -2}) femtosecond pulses of a Ti:sapphire laser ({tau}{sub p} {approx_equal} 130 fs, {lambda} = 800 nm). Precision interferometric measurements (with a spatial resolution of {approx}1.5 {mu}m) were made of the spatiotemporal distribution of the refractive index and electron density in the microplasmas of the air and helium immediately during the action of the exciting femtosecond laser pulse and at the initial stage of free plasma expansion. The microplasma formation was shown to occur as a result of almost complete (up to bare nuclei) ionisation of the initial gas. For the first time the spectral continuum and the dynamics of spectral line formation in the UV and visible spectral ranges were investigated with a picosecond time resolution for the femtosecond laser-produced microplasmas of the air, N{sub 2}, Ar, and He at normal conditions. For the first time the generation of the second (even) laser radiation harmonic was recorded in a femtosecond subcritical-density plasma of gases. (special issue devoted to the 90th anniversary of a.m. prokhorov)},
doi = {10.1070/QE2006V036N07ABEH013173},
journal = {Quantum Electronics (Woodbury, N.Y.)},
issn = {1063-7818},
number = 7,
volume = 36,
place = {United States},
year = {2006},
month = {7}
}