Exciton localisation in InGaAsN and GaAsSbN observed by near-field magnetoluminescence and scanning optical microscopy (NSOM).

The article reports that exciton localisation in InGaAsN and GaAsSbN observed by near-field magnetoluminescence and scanning optical microscopy (NSOM). Dilute nitride alloys have recently attracted considerable attention as promising materials for laser diodes in the 1.3-1.5 mm range, as well as for more efficient solar cells. The article focuses on use of low-temperature NMPL, at fields up to 10 T, to study these fluctuations in detail. Researchers also employ near-field scanning optical microscopy (NSOM) to study the lateral distribution of such QD-like compositional fluctuations by imaging their individual sharp emission lines.