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(Main) Absorption data for GaAs–ErAs grown at vs ErAs volume fraction. (Inset) Peak absorption coefficient vs ErAs volume fraction with best-fit linear trendline.
Absorption data for 3.2% ErAs in (a) GaAs and (b) AlAs for different deposition temperatures. The data for AlAs–ErAs layers exhibit Fabry–Perot oscillations.
Schematic band diagrams (a) before and (b) after accounting for quantum confinement in a nanoparticle assuming the GaAs barrier. Regions with continuous density of states are shaded.
Experimental peak absorption energy vs TEM-determined ErAs nanoparticle size for 3.2% ErAs in GaAs. Predictions of the GaAs and minima models are shown by solid and dashed lines, respectively.
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