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Micropillar geometry used in this work. (a) Cross-sectional TEM 002 dark-field image of a -diameter micropillar (left and top-right figures: 002 dark-field images and bottom-right figure: TEM 111 dark-field image). (b) Schematic view of a micropillar showing the parameters used in the theoretical computations.
(Color online) Numerical study of the impact of the oxide-adlayer cladding and of the DBR corrugation on the micropillar . (a) Impact of the oxide adlayer. factors as a function of pillar diameter for oxide thickness (solid blue curve) and (dashed red curve). Calculations are performed with corrugation . (b) Impact of the corrugation depth. factors as a function of pillar diameter for and for several corrugation depths (solid blue curve), (dashed red curve), and (dashed-dotted green curve).
(Color online) Comparison between (a) experimental and (b) computational results, displaying the pillar factors as a function of the cavity diameter (lower scale) and of the energy (upper scale) of the fundamental cavity mode. The gray dots are the factors measured for different pillars and the black curve is obtained by averaging over adjacent experimental data points. The computational data (b) are obtained for the geometric parameters actually measured on the sample with TEM pictures [see Fig. 1(a)], namely, for and . The arrows indicate the position of minima.
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