Advanced Material, a top-ranking journal in material science, published online the new findings of Prof. Zheng Guoxing’s research group (School of Electronic Information, WHU). The research is the first to realize strict decoupled manipulation of optical amplitude and phase, and to construct multifunctional meta devices with high information density and without crosstalk.
The paper is entitled From Lingering to Rift: Metasurface Decoupling for Near-and Far-Field Functionalization. The first author is Ph.D. student Li Jiaxin, School of Electronic Information, WHU. Prof. Zheng Guoxing, Academician Yu Shaohua (Wuhan Research Institute of Posts and Telecommunications) and Prof. Qiu Chengwei (The National University of Singapore) are the co-corresponding authors. Senior Engineer Wang Yiqun and Ph.D. student Chen Chen (Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences) were responsible for processing the experimental prototype.
The group engaged in innovative research around reusing and decoupling between near‐ and far‐field functionalities, which is a hot topic in research on metasurfaces. With a clever combination of Malus's law and geometric and propagation phase mechanisms, the research realized complete decoupling between the near-field’s amplitude control and far-field’s phase control, handled previous problems about mutual restriction within near‐ and far‐field functionalities, and obtained dual-functionalities metadevices with high density and no crosstalk. As an example, the team designed and gave experimental demonstrations on a new multifunctional metalens which shows enormous potential for the development of metamaterials: it had no difference compared with normal metalens when it comes to imaging and focusing in mode 1, and in mode 2 a nano-printed image with a resolution of 63,500 dots per inch (DPI), about 1/150 of the hair diameter, appears on the metalens’ surface.
Dual-functionalities metalens
In recent years, Prof. Zheng Guoxing’s group has been dedicated to research into new nano‐optoelectronics devices constructed with metamaterials and acquired many achievements, being supported by the National Natural Science Foundation of China, the Science Fund for Distinguished Young Scholars of Hubei Province, etc. Light: Science & Applications（journal of Nature，IF=13.7）, Advanced Functional Materials（IF=16.8）, Advanced Materials, Nano Letters,ACS Nano and many other renowned journals in optics, material science, and nano-tech have published more than 20 papers of Zheng’s group. Many of these have been selected as ESI High Cited Paper and by Editors’ Choice. The research overcomes a range of technical barriers such as improving device efficiency, expanding working bandwidth and the scope of regulation space, and manufacturing large nanostructure materials with high precision. It forms the design theory and method of resonant metamaterials and succeeds in the accumulation of some key technologies of new nano‐optoelectronics metadevices.
Link to the paper: https://onlinelibrary.wiley.com/doi/10.1002/adma.202007507
Rewritten by: Zhang Ruoxi
Edited by: Zhang Yilin
