Conformal Transparent Metamaterials Inducing Ultra-broadband Absorption and Polarization Conversion
A new approach for achieving ultra-broadband absorption and polarization conversion conformal transparent metamaterials (CTM) by using indium tin oxide (ITO) and anisotropic structure was proposed. The absorption conversion rate (ACR) with a high average value of 90% is achieved through CTM. The composite materials of polyethylene terephthalate (PET) and polydimethylsiloxane (PDMS) are used as intermediate dielectric layer to gain optical transparency with a transmittance of nearly 80% on the basis of flexibility. Its absorbing and polarizing conversion performances were analyzed and tested by the construction of the electromagnetic (EM) wave absorbed and shift mechanism, respectively. The nearly 50% of incident EM wave power can be absorbed, and the rest incident electromagnetic wave can be converted into EM waves with different polarizations after full-wave analyses and scientific experiments between 20.75 and 54.05 GHz. This strategy has great potential applications in interference radar detection, optimizing circularly polarized antenna, and EM stealth objects such as glazing, displays, and LCD screens that require transparency.
KeywordsMetamaterial Absorption Conversion Transparent Conformal Ultra-broadband
The authors sincerely thank to the Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, North University of China, for their support with the computer resource.
This study was sponsored by the National Natural Science Foundation of China (Nos. U1637212 and 61605177), National Defense Pre-research Foundation of China (61404130402), and Fund for Shanxi ‘1331 Project’ Key Subjects Construction.
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