Abstract
A reconfigurable multifunctional metasurface is proposed to realize the switching between broadband polarization conversion and perfect absorption by integrating the PIN diodes into the structure. An appropriate feed plate is designed to provide the bias voltage that controls the state of the diodes. When the diodes are in off-state, the metasurface will work in polarization conversion mode, which can convert the co-polarization wave into its cross-polarization state with polarization conversion ratio (PCR) of over 90% in the range from 2.97 to 6.03 GHz; While the diodes are in on-state, the metasurface exhibits perfect absorption with absorptivity of over 90% from 2.56 to 7.62 GHz, and the relative absorption bandwidth (RAB) reaches 99.4%. In addition, the metasurface is fabricated and measured to confirm the multifunctional performance. The proposed metasurface is expected to be applied in electromagnetic detection, stealth technology and communication system.
Highlights
As 2-D version of artificial metamaterials, metasurfaces are the favored candidate for flexible manipulation of electromagnetic (EM) waves through artificially elegant design
In this paper, we reported a reconfigurable multifunctional metasurface that combines a fishbone-like resonator (FLR) polarization converter and a diamond-cross resonator (DCR) absorber through the PIN diodes
The metasurface can achieve the arbitrary switching between broadband polarization conversion and perfect absorption
Summary
As 2-D version of artificial metamaterials, metasurfaces are the favored candidate for flexible manipulation of electromagnetic (EM) waves through artificially elegant design. They can be widely used in many applications, such as negative refraction [1], [2], lens [3], [4], light bending [5], polarization conversion [6]–[15], perfect absorption [16]–[25]. Hong et al incorporated VO2 in the top-layer resonators and the bottom plate of the structure they designed to achieve reconfigurable transmission and reflection linear polarization conversion by controlling the temperature of VO2 [40]; Liu et al designed a galinstan-based metasurface to realize the conversion of linear polarization to cross polarization, circular polarization
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