Key words: supercritical fluids, femtosecond filamentation, supercontinuum generation
It is found that supercritical fluids are unique source of multi-octave supercontinuum
generated under filamentation driven by intense femtosecond laser pulse. When the
laser pulse power exceeds by far the critical power of self-focusing, a supercontinuum
with three and half octaves spectrum width (from 350 to 2000 nm) in supercritical
xenon is generated. In supercritical carbon dioxide, red wing of supercontinuum has a
plateau-like shape in the spectral range from 1400 up to 1900 nm; the blue wing in the
spectrum strongly attenuated.
doi:10.1134/S1990793116080042