Scaling-law anomaly and band-structure-enhanced optical nonlinearities in semiconductor superlattices

Milan Jaros; Mike J. Shaw

doi:10.1117/12.162770

19 November 1993 Scaling-law anomaly and band-structure-enhanced optical nonlinearities in semiconductor superlattices

Milan Jaros, Mike J. Shaw

Proceedings Volume 1985, Physical Concepts and Materials for Novel Optoelectronic Device Applications II; (1993) https://doi.org/10.1117/12.162770
Event: Physical Concepts of Materials for Novel Optoelectronic Device Applications II, 1993, Trieste, Italy

Abstract

We show that there is a well defined class of semiconductor heterostructures (e.g., GaSb- InAs-AlSb, CdHgTe-CdTe) which do not obey the universal scaling law valid for below band gap excitations in bulk insulators and semiconductors. The magnitude, and the frequency at which the third order susceptibility changes its sign, are tunable over a range of energies spanning a significant fraction of the band gap, and reflect the separation in energy and the character of the dispersion in momentum space of higher lying minibands. The role of the microscopic (e.g., band structure) effects is also demonstrated in the range of photon energies capable of generating optical nonlinearities in the mid and far infrared, e.g., via excitations between valence minibands in p-type GaAs-AlAs quantum well structures.

Citation Download Citation

Milan Jaros and Mike J. Shaw "Scaling-law anomaly and band-structure-enhanced optical nonlinearities in semiconductor superlattices", Proc. SPIE 1985, Physical Concepts and Materials for Novel Optoelectronic Device Applications II, (19 November 1993); https://doi.org/10.1117/12.162770

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