Abstract
We report on the first single-state measurement of the broadband (450–800 nm) dielectric function of gold isochorically heated by a femtosecond laser pulse to energy densities of . A Drude and an interband component are clearly seen in the imaginary part of the dielectric function. The Drude component increases with energy density while the interband component shows both enhancement and redshift. This is in strong disagreement with predictions of a recent calculation of dielectric function based on limited Brillouin zone sampling.
- Received 15 May 2006
DOI:https://doi.org/10.1103/PhysRevLett.96.255003
©2006 American Physical Society