Abstract
The variation of the dielectric function with frequency has been studied for polar semiconductors. The strong coupling between the surface plasmons and surface optical phonons at the surface of a polar semiconductor leads to the study of its filtering properties. The effect of a dc magnetic field on the filtering properties has also been studied. This study on six polar semiconductors GaSb, InSb, InAs, GaAs, GaP and InP has shown that they behave as a band pass and high pass filter.
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