Temperature-induced effect on refractive index of graphene based on coated in-fiber Mach–Zehnder interferometer
Li Li-Jun1, 2, 3, †, Gong Shun-Shun1, Liu Yi-Lin1, Xu Lin1, Li Wen-Xian1, Ma Qian3, Ding Xiao-Zhe1, Guo Xiao-Li1
       

(color online) Plots of (a) σr and (b) σi versus temperature in a range from 0 °C to 300 °C.