Method for arbitrary phase transformation by a slab based on transformation optics and the principle of equal optical pathY. Ke, W. Shu, H. Luo, S. Wen and D. FanJ. Eur. Opt. Soc.-Rapid Publ., 7 (2012) 12013DOI: https://doi.org/10.2971/jeos.2012.12013
