Figure 2From: Growth Interruption Effect on the Fabrication of GaAs Concentric Multiple Rings by Droplet EpitaxyPholuminescence spectra of CTQRs recorded at 15 K. GaAs and Al0.3Ga0.7As peaks appeared at 1.52 and 1.90 eV, respectively. Between them additional two features appeared, at 1.55 eV (Peak 1) and at 1.76 eV (Peak 2)Back to article page