Surface Plasmons and the Reflectivity of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>n</mml:mi></mml:math>-Type InSb

Abstract

The reflectivity of $n$-type InSb has been measured in the far infrared. The doping of the samples was such that the free-carrier plasma frequency was near the LO mode frequency. The results suggest that samples with a sufficiently thick damage layer show effects due to surface plasmons. Use of a simple model indicates that the surface-plasma excitations are coupled to the phonons.