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AFM images of Ga droplets on (a) the (001) and (b) surfaces. (Scale bar is .)
(a) Droplet densities vs reciprocal on both (001) and surfaces, where the solid and open circles stand for GaAs (001) and GaAs substrates, and (b) dependence of the Ga droplet size on the surface, where the square and circles stand for the lateral size and height, respectively.
AFM images of GaAs QDs on (001). The crystallization process under the fluxes of (a) and (b) at the of . (Scale bar is .) The droplets on the surface were also crystallized to GaAs QDs under the fluxes of (c) and (d) at the of .
PL spectra for the GaAs QDs (solid line) and the QW (dotted line) grown on the surfaces, respectively.
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