Ultrafast optics of solid density plasma using multicolor probes

We present time-resolved reflectivity and transmissivity of hot, overdense plasma by employing a multicolor probe beam, consisting of harmonics at wavelengths of 800 nm, 400 nm and 266 nm. The hot-dense plasma, formed by exciting a fused silica target with a 30 fs, 2 × 10(17) W cm(-2) intensity puls...

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Published inOptics express Vol. 22; no. 19; pp. 22320 - 22327
Main Authors Singh, Prashant Kumar, Chatterjee, Gourab, Adak, Amitava, Lad, Amit D, Brijesh, P, Ravindra Kumar, G
Format Journal Article
LanguageEnglish
Published United States 22.09.2014
Subjects
Bacterial Proteins - chemistry
Electrons
Optics and Photonics
Time Factors
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Summary:We present time-resolved reflectivity and transmissivity of hot, overdense plasma by employing a multicolor probe beam, consisting of harmonics at wavelengths of 800 nm, 400 nm and 266 nm. The hot-dense plasma, formed by exciting a fused silica target with a 30 fs, 2 × 10(17) W cm(-2) intensity pulse, shows a sub-picosecond transition in reflectivity (transmissivity), and a wavelength-dependent fall (rise) in the reflected (transmitted) signal. A simple model of probe absorption in the plasma via inverse bremsstrahlung is used to determine electron-ion collision frequency at different plasma densities.
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ISSN:1094-4087
1094-4087
DOI:10.1364/oe.22.022320