Fig. 7
From: Droplet etching of deep nanoholes for filling with self-aligned complex quantum structures
Low-temperature PL spectra from two stacked QDs forming a QD pair at very low excitation power of 0.1 W/cm2 (first dot) and 0.2 W/cm2 (second dot). The black line represents the emission from the first and the red line from the second QD. The nanohole template was fabricated at T = 630 °C, θ = 1.0 ML, and F As < 10 −7 Torr. The inset shows a schematics of a self-aligned QDM