title: Ultrafast optics of solid density plasma using multicolor probes.
abstract: 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.
authors.forename: Prashant Kumar
authors.initials: PK
authors.lastname: Singh
authors.forename: Gourab
authors.initials: G
authors.lastname: Chatterjee
authors.forename: Amitava
authors.initials: A
authors.lastname: Adak
authors.forename: Amit D
authors.initials: AD
authors.lastname: Lad
authors.forename: P
authors.initials: P
authors.lastname: Brijesh
authors.forename: G
authors.initials: G
authors.lastname: Ravindra Kumar
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry*; D004583:Electrons; D055095:Optics and Photonics; D013997:Time Factors
chemical_list: D001426:Bacterial Proteins