Optical characteristics of In(Ga)As quantum dots on (100) InP substrate for 1.5 μm laser diodes

We report on round quantum dots grown on InP (100) substrate, which emit around 1.55 μm. At 10 K the full width at half maximum is as small as 28 meV, attesting a rather uniform size distribution. The carrier lifetimes are almost the same across the whole photoluminescence band, indicating the good isolation of quantum dots. Continuous-wave lasings are observed at room temperature from laser diodes made of these quantum dots.