Abstract
Piezo-electric fields in strained-layer superlattices (SLs) evoke strong modifications of the bandstructure. These effects are especially pronounced in polar materials with a hexagonal lattice structure such as Wurtzite-type CdSe and CdS. The separation of optically generated electrons and holes into adjacent layers of type-II SLs screens the piezo-electric fields. [1] The resulting large optical nonlinearites are most promising for the application in optical modulators.
© 1993 Optical Society of America
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