A plasmonic refractive index sensor with double self-reference characteristic Xiangxian Wang, Jiankai Zhu, Yueqi Xu, Yunping Qi, Liping Zhang, Hua Yang and Zao Yi EPL, 135 2 (2021) 27001 Published online: 20 September 2021 DOI: 10.1209/0295-5075/135/27001