Temperature modulation of the optical transitions involving the Fermi surface in Ag: Theory

The thermomodulation mechanism for optical transitions originating or terminating near the Fermi surface in noble metals has been investigated. Detailed thermoderivative line shapes of $\Delta {\epsilon }_2$ for both inter-conduction-band transitions and transitions from the $d$ bands to the Fermi surface have been calculated for Ag. The calculation also gives the temperature dependence of the joint density of states for these transitions.