Exchange coupled Mn-Mn pair: An approach for super-broadband 1380  nm emission in α-MnS

Super-broadbandnear-infrared(NIR) emission centered at 1380  nm with a full width at half maximum of 161 nm and a decay lifetime of 241 μs has been demonstrated in α-MnS. We find that theNIR emission originates from exchange coupled Mn-Mn pairs in α-MnS based on the detail analysis ofphotoluminescence excitationspectra, transientspectra, temperature dependentphotoluminescencespectra as well as thecrystal structure of α-MnS. Mechanism ofexchange interaction between nearest-neighbor Mn2+ ions is discussed in detail. The finding offers the possibilities of designingNIR emitting source for various photonic applications.

Source: Applied Physics Letters - November 9, 2016 Category: Physics Authors: Z. T. Chen, E. H. Song, M. Wu, B. Zhou and Q. Y. Zhang Source Type: research