Phys. Rev. B 40, 11986–11989 (1989)Femtosecond laser melting of graphite
We report the first femtosecond time-resolved measurements of melting dynamics of graphite. A high-reflectivity phase, lasting less than 10 ps, appears when and only when the surface is photoexcited above a critical fluence of 0.13 J/cm2 needed to produce surface damage. The wavelength, polarization, and fluence dependence of time-resolved reflectivity suggest formation of an initial monovalent metallic phase, which transforms within 30 ps to a low-reflectivity phase, similar to that observed in picosecond reflectivity experiments. © 1989 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.40.11986
DOI:
10.1103/PhysRevB.40.11986
PACS:
64.70.Dv, 78.20.Dj, 81.40.Tv
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