Confined and propagating phonons in atomic layer epitaxy grown (CdTe)<SUB>n</SUB>(ZnTe)<SUB>n</SUB> superlattices
- Fromherz, T.
- Oh, Eunsoon
- Ramdas, A. K.
- Koppensteiner, E.
- Bauer, G.
- Faschinger, W.
- Sitter, H.
DOIAbstract
We report the occurrence of confined longitudinal and transverse optical phonons in (CdTe)n(ZnTe)n (2≤ n ≤ 5) ultra-short-period superlattices as observed in their Raman and far-infrared reflectivity spectra. The dispersion curves of the optical phonons in CdTe and in ZnTe along [001], determined from the frequencies of the confined phonons, are in excellent agreement with neutron scattering data on the bulk compounds. For the n = 5 superlattice sample, folded acoustic phonons have been observed
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