Multifocal metalens with a controllable intensity ratio Lv, Haoran ; Lu, Xiaoqing ; Han, Yuansheng ; Mou, Zhen ; Teng, Shuyun Abstract Publication: Optics Letters Pub Date: May 2019 DOI: 10.1364/OL.44.002518 Bibcode: 2019OptL...44.2518L