Optical characterization of supercritical fluid of carbon by femtosecond pump/probe technique

Summary form only given. Supercritical fluid (SCF) of a matter is usually produced under femtosecond laser ablation of metal and semiconductor materials. Optical characteristics of a SCF are gradually changed during adiabatic flow of the initially hot and pressurized fluid. In the case multilayered structure (air-SCF-condensed matter) occurs followed by optical interference phenomena (e.g. "Newton rings"). Rough estimations of optical constants exhibited insulating character of a SCF phase for a number of metal and semiconductor materials. We have calculated optical constants (refractive and attenuation indexes, n and k) of carbon SCF using "interference" approach\´ and experimental data on femtosecond pumping and probing ofa carbon target.