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GaP-based InAs quantum dots (QDs) on a thin GaP1-xNx buffer layer grown by the low-pressure metalorganic chemical vapor deposition were investigated by the atomic force microscopy. The InAs dot density was significantly increased from 2.6 times 109 cm-2 to 2.0 times 1010 cm-2 with increasing the nitrogen composition of the GaP1-xNx from x = 0 to 4.5. The InAs QDs grown on GaP and GaPN with various...
The GaInNAs and GaInAsSb based self-organized quantum dots were investigated. We observed the increased dot density, increased wavelength and improved emission efficiency by adding the nitrogen or antimony into the dot and/or its matrix. These materials are attractive for realizing the long wavelength VCSELs.
MOCVD grown self-assembled quantum dot using dilute nitrogen material system (GaInNAs) is presented for GaAs-based long wavelength VCSELs. Suppression of Coalescence and inhomogeneous broadening by incorporating nitrogen into dot structure is particularly discussed.
Streaming electrification in transformers occurs at the interface between the insulating oil and the insulating material as the oil circulates in the transformer. As a result, the insulating oil and the surface of the solid materials become charged and dielectric breakdown is possible within the oil or at the interface of insulating materials.
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