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Emission spectra from: (a) the side of the GaN:Eu structure for short (—) cavity; dashed lines are Gaussian fit curves; (b) the side of the GaN:Eu structure for long (—) cavity; dashed lines are Gaussian fit curves; and (c) the edge of the long cavity and surface emission with laser.
and peak intensity as a function of peak pump power density. Only shows a threshold for stimulated emission, at .
Eu emission peak wavelength shift as a function of virtual cavity length. The site dominates side emission from short cavities, whereas emission from long cavities and the top surface (PL) is dominated by the site.
The effect of Ga flux during GaN:Eu MBE growth on: (a) peak emission wavelength of and sites and (b) emission decay time constants from and sites.
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