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- W2031567279 abstract "Short-period GaAs/AlAs superlattices grown along the [110] direction have orthorhombic symmetry and thus exhibit two different dielectric functions ensuremath{epsilon}(ensuremath{omega}) along the main axes perpendicular to the growth direction ([001] and [11ifmmodebarelsetextasciimacronfi{}0] direction). Spectroscopic ellipsometry as well as ab initio calculations have been used to determine the optical properties of these superlattices. The ${mathit{E}}_{1}$ transitions split into two components with different strengths for the two principal polarizations. This effect can be qualitatively interpreted on the basis of a kensuremath{cdot}p model for the ${mathit{E}}_{1}$ transitions and confinement arguments. The ${mathit{E}}_{2}$ transition for [001] polarization is lower in energy than the one for [11ifmmodebarelsetextasciimacronfi{}0] polarization. In addition, we observe a transition slightly above ${mathit{E}}_{2}$, which occurs predominantly in [001] polarization. Two other structures specific to the superlattices are identified, in analogy to the case GaAs/AlAs superlattices grown along [001]. Confinement effects on optical transitions for various superlattice periods are also discussed." @default.
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- W2031567279 date "1992-02-15" @default.
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- W2031567279 title "Optical anisotropy in GaAs/AlAs (110) superlattices" @default.
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- W2031567279 doi "https://doi.org/10.1103/physrevb.45.3546" @default.
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