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(Color online) AFM images of the sample A surfaces at different growth stages: after (a) the GaN template growth, (b) after the growth of a InGaN layer, and (c) after the GaN cap layer deposition.
(a) AFM profiles and (b) calculated energy profiles for the QW next to the surface. The dotted line represents an averaged energy profile. See text below for explanation.
(Color online) (a) CL spectra of sample B. Images (b) by AFM of the surface and by monochromatic CL (on a different location) at (c) and (d) of the thin QW of sample B.
(Color online) Streak camera traces (a) in the valley and (b) outside the valley region. Color coded intensities are in arbitrary units. Black lines are guides to the eye.
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