title: Fully interferometric controllable anomalous refraction efficiency using cross modulation with plasmonic metasurfaces.
abstract: We present a method of fully interferometric, controllable anomalous refraction efficiency by introducing cross-modulated incident light based on plasmonic metasurfaces. Theoretical analyses and numerical simulations indicate that the anomalous and ordinary refracted beams generated from two opposite-helicity incident beams and following the generalized Snell's law will have a superposition for certain incident angles, and the anomalous refraction efficiency can be dynamically controlled by changing the relative phase of the incident sources. As the incident wavelength nears the resonant wavelength of the plasmonic metasurfaces, two equal-amplitude incident beams with opposite helicity can be used to control the anomalous refraction efficiency. Otherwise, two unequal-amplitude incident beams with opposite helicity can be used to fully control the anomalous refraction efficiency. This Letter may offer a further step in the development of controllable anomalous refraction.
authors.forename: Zhaocheng
authors.initials: Z
authors.lastname: Liu
authors.forename: Shuqi
authors.initials: S
authors.lastname: Chen
authors.forename: Jianxiong
authors.initials: J
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Cheng
authors.forename: Zhancheng
authors.initials: Z
authors.lastname: Li
authors.forename: Wenwei
authors.initials: W
authors.lastname: Liu
authors.forename: Ping
authors.initials: P
authors.lastname: Yu
authors.forename: Ji
authors.initials: J
authors.lastname: Xia
authors.forename: Jianguo
authors.initials: J
authors.lastname: Tian