Hybrid graphene/GaN ultraviolet photo-transistors with high responsivity and speed Tian, Huijun ; Liu, Qiaoli ; Hu, Anqi ; He, Xiaoying ; Hu, Zonghai ; Guo, Xia Abstract Publication: Optics Express Pub Date: March 2018 DOI: 10.1364/OE.26.005408 Bibcode: 2018OExpr..26.5408T