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Photoluminescence spectra recorded in the same conditions above the nanobox array and above unpatterned SOI (intensity of photoluminescence of SOI is ten times magnified). On the right, a SEM view of a few nanoboxes and a schematic view of the sample cross section are presented.
(Color online) Computed 2D band diagram of the nanobox array in the direction and for the reduced frequency range corresponding to the recorded spectra. Modes under the light line are plotted in (a) and modes above the light line in (c). Luminescence spectrum recorded on the edge of the sample and normalized by the line shape of SOI emission on the edge is presented in (b), and in (d) the luminescence spectrum recorded on the top of the sample and normalized by the line shape of SOI emission in the same direction is plotted. Schematic views of the experiments are shown on the top of the figure.
(Color online) The two pictures show the experimental vertical emission of the and modes during their propagation. Emission areas (EAs) are indicated by the white circles on the pictures. Graph on the right represents the decrease of light collected for the and modes as a function of the distance between excitation and collection areas along two different directions of the array. Plotted curves are simply cross sections of the pictures. A schematic view of the experiment principle is also presented.
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