Figure 2From: Quantum Dot Infrared Photodetectors: Photoresponse Enhancement Due to Potential BarriersAFM images of a typical surface quantum dot sample; different positions on a 2 in. wafer; the deposited In increases from left to right and from top to bottom going from just a wetting layer ( left upper image ) to a concentration of 4 × 1010 dots/cm2 in the right lower image.Back to article page