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High ly efficient anomalous reflection by ultrathin phase gradient planar meta surface arrays in near infrared region

MIAN JIA1, HUIHUI ZHU2, DONGSHUO ZHU3, WEIMIN WANG1, GUOHUA SHI4, XUFENG JING1,*

Affiliation

  1. Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China
  2. State Key Laboratory of Modern Optical Instrumentations, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China
  3. Institute of art and design Renmin University of China
  4. Institute of Suzhou Biomedical Engineering, Chinese Academy of Sciences

Abstract

The high er efficient anomalous reflection performance in short wavelength region is carefully designed and numerically demonstrated based on an ultrathin phase gradient meta surface arrays. T he se meta surface s , comprising a periodic arrangement of metal nanobricks configurations providing required phase shift for the reflected beam from 0°to 360°, exhibit a higher conversion efficiency of about 8 7 limited by Ohmic loss in the metal to anomalous reflection mode at normal incidence. Importantly, the light polarization of the anomalous reflection is same as that of the incident wave. The generalized Snell’s law is verified by the near field propagating characteristics of a plane wave and the far field distribution. Compared with a conventional optical phase shifts components, n ew degrees of designed freedom can be attained by introducing this abrupt linear phase variation along the ultrathin planar interface . Based on these metasurfaces with the great flexibility in manipulation of light beam, some optical components with inaccessible functionalities by a traditional nanostructure can be reali zed. Further, the discrete elements in a unit array are replaced by the continuous one , in which the anomalous reflection phenomenon also arises..

Keywords

Metasurface, Metamaterial, Anomalous reflection, Infrared region.

Citation

MIAN JIA, HUIHUI ZHU, DONGSHUO ZHU, WEIMIN WANG, GUOHUA SHI, XUFENG JING, High ly efficient anomalous reflection by ultrathin phase gradient planar meta surface arrays in near infrared region, Optoelectronics and Advanced Materials - Rapid Communications, 11, 3-4, March-April 2017, pp.148-152 (2017).

Submitted at: Sept. 8, 2016

Accepted at: April 6, 2017