Abstract
Effects of thermal annealing on optical and structural properties of GaInNAs/GaAs quantum well (QW) heterostructures, which were coated with dielectric films, were studied using photoluminescence, x-ray diffraction (XRD), and secondary-ion mass spectrometry (SIMS). A sample having no dielectric coating exhibited a rapid saturable blueshift in the beginning of annealing. A Si3N4 cap layer prevented the line shift, while a SiO2 cap enhanced the shift. The XRD and SIMS spectra provided evidence that the large blueshift for the SiO2-capped sample originated from Ga/In interdiffusion across the QW walls, and from a local reorganization of N-bonding configuration within the QW. The inhibition of blueshift for the Si3N4-capped sample was likely due to an improved stability of Ga–N bonds during annealing.
Original language | English |
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Pages (from-to) | 4102 - 4104 |
Number of pages | 3 |
Journal | Journal of Applied Physics |
Volume | 95 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2004 |
MoE publication type | A1 Journal article-refereed |
Keywords
- quantum wells