Ultrafast optics of solid density plasma using multicolor probes | Zendy

Prashant Kumar Singh | Zendy; Gourab Chatterjee | Zendy; Amitava Adak | Zendy; Amit D. Lad | Zendy; P. Brijesh | Zendy; G. Ravindra Kumar | Zendy

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Ultrafast optics of solid density plasma using multicolor probes

Author(s) -

Prashant Kumar Singh,

Gourab Chatterjee,

Amitava Adak,

Amit D. Lad,

P. Brijesh,

G. Ravindra Kumar

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.022320

Subject(s) - optics , ultrashort pulse , picosecond , plasma , materials science , wavelength , absorption (acoustics) , bremsstrahlung , atomic physics , laser , physics , photon , quantum mechanics

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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