2ND-HARMONIC GENERATION VIA EXCITATIONS BETWEEN VALENCE SUBBANDS IN P-TYPE GAAS-ALAS AND SI-SIGE QUANTUM-WELL STRUCTURES

Authors
WONG KB SHAW MJ JAROS M
Citation
Kb. Wong et al., 2ND-HARMONIC GENERATION VIA EXCITATIONS BETWEEN VALENCE SUBBANDS IN P-TYPE GAAS-ALAS AND SI-SIGE QUANTUM-WELL STRUCTURES, Materials science & engineering. B, Solid-state materials for advanced technology, 21(2-3), 1993, pp. 296-299
Citations number
6
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Materials science & engineering. B, Solid-state materials for advanced technology → ACNP
ISSN journal
09215107
Volume
21
Issue
2-3
Year of publication
1993
Pages
296 - 299
Database
ISI
SICI code
0921-5107(1993)21:2-3<296:2GVEBV>2.0.ZU;2-Q
Abstract
We present full-scale calculations of the frequency dependence of seco nd harmonic generation due to intervalence subband transitions in p-ty pe GaAs-AlAs and Si-SiGe asymmetric quantum well structures (QWSs). We demonstrate that the response is dominated by excitations lying throu ghout the Brillouin zone and that the states involved are not predicte d by semiclassical models. Significant light and heavy hole momentum m ixing away from the zone center is responsible for the second harmonic generation.