Abstract
AbstractSurface phonon polaritons in a semi‐infinite semiconductor superlattice bounded by vacuum are studied. The modes associated with the polaritons are obtained and used to obtain the dispersion relation. Numerical results show that polariton bands exist between the TO and LO phonon frequencies, and are found to approach two surface mode frequencies in the limit of large tangential wave vector. The dependency of frequencies on the ratio of layer thicknessses is shown. The results are illustrated by a GaAs—GaP superlattice bounded by vacuum.
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