Figure 4.

Photoluminescence emission (filled areas) ascribed to QD1(a) and QD2(b) nanostructures for 1.2, 1.4, and 1.5 ML of InAs deposited to form the QD1 layer. It can be clearly shown in (a) a tuning effect on the emission energy of QD1. On the other hand, (b) shows that the emission corresponding to QD2 layer remains almost unaltered despite the difference in size in QD1

Alonso-Gonz├ílez et al. Nanoscale Research Letters 2010 5:1913-1916   doi:10.1007/s11671-010-9771-2