title: Holographic leaky-wave metasurfaces for dual-sensor imaging.
abstract: Metasurfaces have huge potentials to develop new type imaging systems due to their abilities of controlling electromagnetic waves. Here, we propose a new method for dual-sensor imaging based on cross-like holographic leaky-wave metasurfaces which are composed of hybrid isotropic and anisotropic surface impedance textures. The holographic leaky-wave radiations are generated by special impedance modulations of surface waves excited by the sensor ports. For one independent sensor, the main leaky-wave radiation beam can be scanned by frequency in one-dimensional space, while the frequency scanning in the orthogonal spatial dimension is accomplished by the other sensor. Thus, for a probed object, the imaging plane can be illuminated adequately to obtain the two-dimensional backward scattered fields by the dual-sensor for reconstructing the object. The relativity of beams under different frequencies is very low due to the frequency-scanning beam performance rather than the random beam radiations operated by frequency, and the multi-illuminations with low relativity are very appropriate for multi-mode imaging method with high resolution and anti- noise. Good reconstruction results are given to validate the proposed imaging method.
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing, 210096, China.
authors.forename: Yun Bo
authors.initials: YB
authors.lastname: Li
authors.affiliation: Department of Electronics Engineering and Computer Science, Peking University, Beijing, 100871, China.
authors.forename: Lian Lin
authors.initials: LL
authors.lastname: Li
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing, 210096, China.
authors.forename: Ben Geng
authors.initials: BG
authors.lastname: Cai
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.
authors.forename: Tie Jun
authors.initials: TJ
authors.lastname: Cui