Spoof Plasmonic Metasurfaces with Catenary Dispersion for Two-Dimensional Wide-Angle Focusing and Imaging
| Autor: | Xiong Li, Yijia Huang, Xiaoliang Ma, Mingbo Pu, Yinghui Guo, Zuojun Zhang, Xiangang Luo, Mingfeng Xu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Phase (waves) Physics::Optics 02 engineering and technology Electromagnetic radiation Article 03 medical and health sciences Optics Planar Dispersion (optics) Catenary Polariton lcsh:Science Plasmon Computer Science::Cryptography and Security Physics Multidisciplinary business.industry Optical Imaging 021001 nanoscience & nanotechnology Surface 030104 developmental biology Proof of concept lcsh:Q 0210 nano-technology business Electromagnetic Waves |
| Zdroj: | iScience iScience, Vol 21, Iss, Pp 145-156 (2019) |
| ISSN: | 2589-0042 |
| Popis: | Summary Although tremendous efforts have been devoted to investigating the analogy between the surface plasmon polariton and its spoof counterparts, it remains elusive that a single thin spoof plasmonic metalens realizes wide-angle focusing and wide field-of-view (FOV) imaging. Here, we propose a spoof plasmonic metasurface that can impart arbitrary phase with high transmittance, which comprises two-dimensional (2D) gradient spoof-insulator-spoof waveguides. With the developed catenary field and dispersion theory, their intrinsic physics is theoretically analyzed. As a proof of concept, a spoof plasmonic metalens with a thickness of 0.15λ has been elaborately designed and experimentally demonstrated for wide-angle (∼170°) focusing and wide FOV (∼40°) imaging. To the best of our knowledge, it is the first experimental demonstration of wide FOV imaging of a 2D object with single thin and planar metalens in the microwave regime. The proposed method offers a promising solution to compact cameras, integrated imaging, and detection systems. Graphical Abstract Highlights • Thin spoof metalens has been developed • A satisfactory qualitative description through catenary dispersion theory • Wide-angle microwave focusing (170°) and wide FOV (40°) imaging of 2D objects Optical Imaging; Electromagnetic Waves; Surface |
| Databáze: | OpenAIRE |
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