Dielectric meta-walls for surface plasmon focusing and Bessel beam generation Shaohua Dong, Zhuo Wang, Huijie Guo, Fuxin Guan, Xiaoer Li, Qiong He, Haibin Zhao, Lei Zhou and Shulin Sun EPL, 122 6 (2018) 67002 Published online: 25 July 2018 DOI: 10.1209/0295-5075/122/67002