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Combining the absorptive and radiative loss in metasurfaces for multi-spectral shaping of the electromagnetic scattering.

Pan W, Huang C, Pu M, Ma X, Cui J, Zhao B, Luo X - Sci Rep (2016)

Bottom Line: The absorptive and radiative losses are two fundamental aspects of the electromagnetic responses, which are widely occurring in many different systems such as waveguides, solar cells, and antennas.The anti-phase gradient and absorptive metasurfaces were designed that consists of metallic square patch and square loop structure inserted with resistors, acting as an phase gradient material in the X and Ku band, while behaving as an absorber in the S band.The simulation and experiment results verified the double-band, wideband and polarization-independent RCS reduction by the absorptive and anti-phase gradient metasurfaces.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Science, P. O. Box 350, Chengdu 610209, China.

ABSTRACT
The absorptive and radiative losses are two fundamental aspects of the electromagnetic responses, which are widely occurring in many different systems such as waveguides, solar cells, and antennas. Here we proposed a metasurface to realize the control of the absorptive and radiative loss and to reduce the radar cross section (RCS) in multi-frequency bands. The anti-phase gradient and absorptive metasurfaces were designed that consists of metallic square patch and square loop structure inserted with resistors, acting as an phase gradient material in the X and Ku band, while behaving as an absorber in the S band. The simulation and experiment results verified the double-band, wideband and polarization-independent RCS reduction by the absorptive and anti-phase gradient metasurfaces.

No MeSH data available.


Related in: MedlinePlus

Principle of the virtual shaping based on anti-phase metasurface.(a) Schematic of the scattering from a planar surface with anti-phase metasurface under normal illumination. (b) The scattered waves from a metallic surface with different step heights under normal illumination.
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f1: Principle of the virtual shaping based on anti-phase metasurface.(a) Schematic of the scattering from a planar surface with anti-phase metasurface under normal illumination. (b) The scattered waves from a metallic surface with different step heights under normal illumination.

Mentions: The main objective of this paper is to design a combination of absorptive and phase gradient metasurfaces that can achieve RCS reduction at two broad bands. Figure 1 shows the schematic of phase gradient metasurface. It is composed of two different elements with 180° reflection phase difference in a chessboard-like configuration. In this alternating circumstance, the virtual shape of the metasurface is just like a chessboard pattern with different step heights, as shown in Fig. 1(b). When the incoming wave is incident on this metasurface, the reflection wave along the normal would be cancelled out and the backscatter energy is redirected to other angles. Therefore, the phase gradient metasurface is able to reduce the RCS by utilizing the anti-phase reflection property to alter the scattering patterns.


Combining the absorptive and radiative loss in metasurfaces for multi-spectral shaping of the electromagnetic scattering.

Pan W, Huang C, Pu M, Ma X, Cui J, Zhao B, Luo X - Sci Rep (2016)

Principle of the virtual shaping based on anti-phase metasurface.(a) Schematic of the scattering from a planar surface with anti-phase metasurface under normal illumination. (b) The scattered waves from a metallic surface with different step heights under normal illumination.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4759823&req=5

f1: Principle of the virtual shaping based on anti-phase metasurface.(a) Schematic of the scattering from a planar surface with anti-phase metasurface under normal illumination. (b) The scattered waves from a metallic surface with different step heights under normal illumination.
Mentions: The main objective of this paper is to design a combination of absorptive and phase gradient metasurfaces that can achieve RCS reduction at two broad bands. Figure 1 shows the schematic of phase gradient metasurface. It is composed of two different elements with 180° reflection phase difference in a chessboard-like configuration. In this alternating circumstance, the virtual shape of the metasurface is just like a chessboard pattern with different step heights, as shown in Fig. 1(b). When the incoming wave is incident on this metasurface, the reflection wave along the normal would be cancelled out and the backscatter energy is redirected to other angles. Therefore, the phase gradient metasurface is able to reduce the RCS by utilizing the anti-phase reflection property to alter the scattering patterns.

Bottom Line: The absorptive and radiative losses are two fundamental aspects of the electromagnetic responses, which are widely occurring in many different systems such as waveguides, solar cells, and antennas.The anti-phase gradient and absorptive metasurfaces were designed that consists of metallic square patch and square loop structure inserted with resistors, acting as an phase gradient material in the X and Ku band, while behaving as an absorber in the S band.The simulation and experiment results verified the double-band, wideband and polarization-independent RCS reduction by the absorptive and anti-phase gradient metasurfaces.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Science, P. O. Box 350, Chengdu 610209, China.

ABSTRACT
The absorptive and radiative losses are two fundamental aspects of the electromagnetic responses, which are widely occurring in many different systems such as waveguides, solar cells, and antennas. Here we proposed a metasurface to realize the control of the absorptive and radiative loss and to reduce the radar cross section (RCS) in multi-frequency bands. The anti-phase gradient and absorptive metasurfaces were designed that consists of metallic square patch and square loop structure inserted with resistors, acting as an phase gradient material in the X and Ku band, while behaving as an absorber in the S band. The simulation and experiment results verified the double-band, wideband and polarization-independent RCS reduction by the absorptive and anti-phase gradient metasurfaces.

No MeSH data available.


Related in: MedlinePlus