โ Scribed by J.R. Beattie
No coin nor oath required. For personal study only.
The interpretation of the optical constants of metals in the near infra-red is briefly reviewed. Dingle's dispersion formulae for this part of the spectrum are given in a simple form, and used to analyse some results forsilver and aluminium films. The conductivity of the films, measured with direct current, is used in the analysis. Agreement is obtained to second order accuracy in the case of silver. There is one free electron per silver atom, and a fraction 0.77 of the conduction electrons were diffusely reflected at the surface of the metal. For aluminium, the dispersion curve deviates from Dingle's theory for ~t < 5/~. For )t > 5l* exact numerical agreement cannot be obtained. It is thought that these discrepancies are due to the influence of the band structure of aluminium.
๐ SIMILAR VOLUMES
In an earlier paper 1) tentative expressions for optical absorption by semiconductors were obtained by averaging expressions valid for metals over the "transport distribution function", and the results discussed. In the present work, more general formulae are derived rigorously by solving the integr