Optical properties of the metals Al, Co, Cu, Au, Fe, Pb, Ni, Pd, Pt, Ag, Ti, and W in the infrared and far infrared

Abstract

Infrared optical constants collected from the literature are tabulated. The data for the noble metals and Al, Pb, and W can be reasonably fit using the Drude model. It is shown that $-{∊}_1\left(\omega \right)={∊}_2\left(\omega \right)\simeq {\omega }_p^2/\left({2\omega }_{\tau }^2\right)$ at the damping frequency ω = ω_τ. Also −∊₁(ω_τ) ≃ −(½) ∊₁(0), where the plasma frequency is ω_p.