Answers are grounded in this paper and cite their sources.
We report the first systematic study of above---band-gap optical anisotropies in cubic semiconductors. The anisotropies are large, of the order of 1%. The dominant intrinsic contributions for (110) Si and Ge are due to surface many-body screening and bulk spatial dispersion. Extrinsic contributions from chemisorbed and physisorbed species also play important roles.
No takes yet. Share an insight, caveat, or question.
Aspnes et al. (1985) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: