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| Citation: | Liu Junfeng, Liu Shuo, Fu Xiaojian, Cui Tiejun. Terahertz Information Metamaterials and Metasurfaces[J]. Journal of Radars, 2018, 7(1): 46-55. doi: 10.12000/JR17100
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Terahertz Information Metamaterials and Metasurfaces
DOI: 10.12000/JR17100
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Abstract
In this paper, we review the recent developments on information metamaterials, including digital metamaterials, coding metamaterials, and programmable metamaterials; furthermore, we discuss their applications in the terahertz (THz)-frequency region. In addition their flexibility to manipulate the electromagnetic waves, the physical principle, numerical simulation, fabrication, and application of information metamaterial are discussed in detail. Moreover, we developed and applied a coding metasurface that works in the THz band. Furthermore, the principle of real-time programmable metamaterials and their application in novel imaging systems and radar systems are illustrated. Information metamaterials and metasurfaces can be used for various functional devices such as beam splitting and low radar cross section, which open up a novel route to manipulate THz radiations. -
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References
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- Figure 1. Metasurface based on generalized reflection and refraction laws[2]
- Figure 2. The Metamaterials particle for realizing the coding metasurface[11]
- Figure 3. The coding metasurface and reflected directivity pattern[11]
- Figure 4. Coding metasurface and Minkowski coding particle[16]
- Figure 5. The design of Minkowski coding particles of metasurface[16]
- Figure 6. The fabrication process for the coding metasurface and part of the fabricated sample[16]
- Figure 7. The controllable THz metamaterails based on semiconductor[22]
- Figure 8. The metamaterial particle for realizing the digital metasurface and the corresponding phase responses[11]
- Figure 9. Dynamic holographic imaging based on programmable metasurface[23]
- Figure 10. The proposed new concept radar systems based programmable metasurface[11]
- Figure 11. Numerical simulation results of scattering patterns for digital metasurface under different coding sequences: (a) 000000, (b) 111111, (c) 010101 and (d) 001011. (e)–(h) Experimental results of scattering patterns for the digital metasurface under different coding sequences: (e) 000000, (f) 111111, (g) 010101 and (h) 001011[11]