title: Harmonic image reconstruction assisted by a nonlinear metmaterial surface.
abstract: We experimentally demonstrate a microwave far-field image reconstruction modality with the transverse resolution exceeding the diffraction limit by using a single layer of highly nonlinear metamaterial. The harmonic fields of the nonlinear metamaterial surface allow the far-field propagation of wave fronts with spatial frequencies several times higher than that of the fundamental field. Near-field images can thus be mathematically recovered from the far-field patterns of the harmonic fields.
authors.affiliation: Department of Information and Electronic Engineering, Zhejiang University, Hangzhou, China.
authors.forename: Zhiyu
authors.initials: Z
authors.lastname: Wang
authors.forename: Yu
authors.initials: Y
authors.lastname: Luo
authors.forename: Tao
authors.initials: T
authors.lastname: Jiang
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wang
authors.forename: Jiangtao
authors.initials: J
authors.lastname: Huangfu
authors.forename: Lixin
authors.initials: L
authors.lastname: Ran