Gate-voltage control of angular and spatial shifts for a dielectric slab containing graphene Min Cheng, Ping Fu, Xiahui Zeng, Yingting Lin, Xiaoteng Tang and Shangyuan Feng Eur. Phys. J. D, 70 7 (2016) 158 Published online: 21 July 2016 DOI: 10.1140/epjd/e2016-60688-5