Bolometric effect in a waveguide-integrated graphene photodetector

Wang Yubing, Yin Weihong, Han Qin^†,, Yang Xiaohong, Ye Han, Lv Qianqian, Yin Dongdong

(a) The R–V_b curve with and without illumination; (b) the resistance change induced by photo illumination as a function of bias voltage V_b; (c) the calculated Joule heating T as a function of bias voltage V_b; (d) the correlation between resistance R and Joule heating K. The bolometric effect coefficient β is extracted to be 25.8 Ω·K⁻¹.