Fig. 2From: Telecommunication Wavelength-Band Single-Photon Emission from Single Large InAs Quantum Dots Nucleated on Low-Density Seed Quantum Dots1 × 1 μm2 AFM images of uncapped active QDs (a–d) and uncapped seed QDs (e–h) along the direction of In flux gradient. Small black arrows indicate active QDs for 1.3 μm emissionBack to article page