Multi-wavelength lenses for terahertz surface wave Wei, Minggui ; Yang, Quanlong ; Xu, Quan ; Zhang, Xueqian ; Li, Yanfeng ; Gu, Jianqiang ; Han, Jiaguang ; Zhang, Weili Abstract Publication: Optics Express Pub Date: October 2017 DOI: 10.1364/OE.25.024872 Bibcode: 2017OExpr..2524872W