Anomalous optical nonlinearity in semiconductor superlattices
- 15 January 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 47 (3) , 1620-1623
- https://doi.org/10.1103/physrevb.47.1620
Abstract
We show that the intensity-dependent below-band-gap refractive index of semiconductor superlattices behaves very differently from that prescribed by the band-gap scaling law for bulk semiconductors. Distinct new features in the frequency dependence of the nonlinear index (e.g., change of sign) are found and linked to specific superlattice band-structure parameters.Keywords
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