Cover Story： Wang S C, Ouyang X Y, Feng Z W, Cao Y Y, Gu M et al. Diffractive photonic applications mediated by laser reduced graphene oxides. Opto-Electron Adv 1, 170002 (2018). 

 Graphene, a two dimensional carbon material with peculiar electronic and optical properties, has been a research hotspot in the emerging research fields nowadays. However, cost-effective and scalable production of graphene with large lateral sizes is still an enormous challenge for its practical applications. Laser induced reduction of graphene oxide provides an easy-to-implement, facile, and controllable approach, which avoids the complex additional transfer process needed in the traditional chemical and heat annealing reduction methods, to address the challenge. This novel reduction approach accelerates the developments of graphene-based advanced optoelectronic devices intensively. In this article, a comprehensive review including ultra-broadband graphene oxide ultrathin lenses, athermally photoreduced graphene oxides for three-dimensional holographic images, etc. implemented by Professor Min Gu's group and Professor Xiangping Li is given. These research achievements prove that laser reduced graphene oxide has been a paradigm-shifting platform for diffractive photonic devices.