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(a) Schematic description of the sample. (b) Reflectivity and luminescence spectra recorded at 77 K on the sample before the silver deposition.
(a) Experimental (solid black line) and calculated (dashed gray line) reflectivity spectra for an incident angle of 26.5°. The Bragg stop-band deduced from the calculations is centered at 1512 meV. (b), (c) Experimental and calculated dispersion relation deduced from the reflectivity spectra, respectively. All the experiments have been performed at 77 K.
(a) Luminescence spectra recorded at 77 K for detections angles of 18.5°, 26.5°, and 33°. (b) Dispersion relation of the emission. The open dots correspond to the experimental energy position of the reflectometry dips.
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