Flat-Top and Stacking-Fault-Free GaAs-Related Nanopillars Grown on Si Substrates

Figure 6

GaAs nanopillar containing an InAs dot. (a) HR-TEM image of the nanopillar and SAED patterns; (b) element mapping by EDS obtained from K lines; (c) PL spectrum of one nanopillar at 4 K.