@article {Callan:138,
	title = {Universal dynamics during and after ultrafast laser-induced semiconductor-to-metal transitions},
	journal = {Phys. Rev. B},
	volume = {64},
	year = {2001},
	pages = {073201{\textendash}4},
	abstract = {We observe common features in semiconductor-to-metal transitions induced by femtosecond laser pulses in crystalline GaAs, amorphous GaAs and Sb-rich films of amorphous GeSb, by tracking ultrafast changes in the spectral dielectric function. The dielectric function of the metal-like state reveals a decay in the plasma frequency with time after the transition. In addition, the plasma frequency roughly decreases with increasing excitation fluence.},
	author = {J. Paul Callan and A. M.-T. Kim and C. A. D. Roeser and Mazur, E.}
}
