Heavily n-doped PbS colloidal quantum dot films achieve infrared stimulated emission at single-exciton gain thresholds (0.9 excitons per dot) with ASE saturation and modal gain up to 114 cm^-1 across the telecom band.
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Single-Exciton Gain and Stimulated Emission Across the Infrared Optical Telecom Band from Robust Heavily-doped PbS Colloidal Quantum Dots
Heavily n-doped PbS colloidal quantum dot films achieve infrared stimulated emission at single-exciton gain thresholds (0.9 excitons per dot) with ASE saturation and modal gain up to 114 cm^-1 across the telecom band.