Plasmonically-enhanced mid-infrared photoluminescence in a metal/narrow-gap semiconductor structurePengqi Lu, Chunfeng Cai, Bingpo Zhang, Bozhi Liu, Huizhen Wu, Gang Bi and Jianxiao SiEPL, 114 3 (2016) 37005DOI: https://doi.org/10.1209/0295-5075/114/37005