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 -∊l(ω) = ∊2(ω) ≃ ω2p/(2ω2τ) at the damping frequency ω = ωτ. Also -∊l(ω τ) ≃ - (½) ∊l(0), where the plasma frequency is ωp.
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