Nonlinear optical response of semiconductors in the independent-particle approximation
- 15 October 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 48 (16) , 11705-11722
- https://doi.org/10.1103/physrevb.48.11705
Abstract
We present a formalism for the calculation of the optical response of semiconductors in the independent-particle approximation. The unphysical divergences at zero frequency that plagued earlier approaches are eliminated by a careful treatment of interband and intraband motion, yet the calculations can be made in a way very analogous to usual perturbation theory. The general formalism is illustrated by deriving an expression for the response coefficient for second-harmonic generation.Keywords
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