Journal of Crystal Growth, Vol.227, 1034-1038, 2001
Blueshift of photoluminescence peak in ten periods InAs quantum dots superlattice
We have observed a temperature insensitive and an unusual blueshift of photoluminescence peak; energy in ten periods self-organized InAs quantum dots superlattice. The net temperature dependence of PL wavelength for samples with 3, 4 and 5 monolayer ten periods InAs quantum dots superlattice. respectively, are 0.15, 0.13 and 0.17 nm/degreesC, respectively. The temperature dependence of the InAs quantum dots shows a significantly different trend when the InAs layer thickness is smaller (redshift) or larger (blueshift) than around 4ML.
Keywords:quantum dots;molecular beam epitaxy;semiconducting indium compounds;nonlinear optical devices