Simulated PL maps and spectra of chirped QDM bilayers. Simulated PL maps I(E,T) of (a) type-I, (b) type-II, and (c) type-III chirped QDM bilayers using parameters extracted from the measured spectra in Figure 4a,b,c, respectively. Line spectra at selected temperatures from (a), (b), and (c) are shown in (d), (e), and (f) and are meant to model the measured results in Figure 4d,e,f, respectively. Dashed lines in (a) to (c) are bandgap variations with temperature according to Varshni's equation with bulk InAs parameters, linearly shifted to match the lowest-energy cQD peaks. Spectra in (d) to (f) are offset for clarity.
Patanasemakul et al. Nanoscale Research Letters 2012 7:207 doi:10.1186/1556-276X-7-207