Broadband terahertz reflector based on dielectric metamaterials Zhengyong Song, Qiongqiong Chu, Weihua Wang, Longfang Ye, Guoxiong Cai and Qing Huo Liu EPL, 119 4 (2017) 47004 Published online: 06 November 2017 DOI: 10.1209/0295-5075/119/47004