Optical interband transitions in a series of In0.23 Ga0.77 As-Ga Nx As1-x quantum well samples are investigated. For changing nitrogen content, a type I-type II transition is identified by a detailed analysis of photoluminescence and photoreflectance spectra. Experimental results are compared systematically with spectra calculated by a microscopic theory. A valence band offset parameter of (1.5±0.5) eV is extracted for this heterostructure system.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)