Abstract

The calculations of the optical conductivity, relative to the transitions due to surface states, are performed with the light polarized perpendicularly to the surface of the film. In the spectral range where this sort of absorption exists, the superficial film shows a selective anisotropy. We develop the importance of this anisotropy on the validity of the methods concerning the measurements of the optical parameters and specially the conductivity. Our calculations are compared with the experimental optical parameters for potassium. A good agreement is obtained between our results and the experimental values in the infrared spectral range.

© 1981 Optical Society of America

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