Abstract-Frequency-Dependent Dual-Functional Coding Metasurfaces at Terahertz Frequencies

http://onlinelibrary.wiley.com/doi/10.1002/adom.201600471/full

A frequency-dependent dual-functional coding metasurface is proposed at terahertz frequencies using two layers of metamaterial structures, each of which is responsible for the independent control of reflection phases at two distinct frequencies. The zero interference between the functionalities at the lower and higher frequencies are promising for possible applications in multicolor holography for color displays or a frequency beam splitter.

Abstract-Free-Standing Metasurfaces for High-Efficiency Transmitarrays for Controlling Terahertz Waves

1. Shuo Liu^1,2, 
2. Qiang Cheng^1,3, 
3. Quan Xu⁴,
4. Tian Qi Wang^1,2, 
5. Liang Liang Du⁴, 
6. Kang Luan^1,2, 
7. Yue Hong Xu⁴, 
8. Di Bao^1,2, 
9. Xiao Jian Fu^1,2, 
10. Jia Guang Han⁴, 
11. Wei Li Zhang^3,4 and
12. Tie Jun Cui^1,3,*

Article first published online: 11 DEC 2015

DOI: 10.1002/adom.201500519

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

http://onlinelibrary.wiley.com/doi/10.1002/adom.201500519/abstract;jsessionid=1E8BB761E0D01A393F30C1F518B17754.f01t04?userIsAuthenticated=false&deniedAccessCustomisedMessage=

An ultrathin free-standing metasurface is proposed to bend the normally incident terahertz wave to an anomalous direction, or to focus plane wave to a point, with high efficiency. The flexibility and endurable nature of the proposed transmitarray make it a promising candidate for various THz applications such as time-domain system or THz imaging devices.