Photonics Research, 2019, 7 (4): 04000478, Published Online: Apr. 11, 2019   

Transparently curved metamaterial with broadband millimeter wave absorption

Author Affiliations
1 State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
2 e-mail: qiangcheng@seu.edu.cn
3 e-mail: tjcui@seu.edu.cn
Abstract
We present a conformal metamaterial with simultaneous optical transparency and broadband millimeter-wave absorption for a curved surface. By tailoring the reflection response of meta-atoms at oblique angles, it is possible to achieve excellent absorption performance from 26.5 to 40.0 GHz within a wide angular range from 0° to 60° for transverse-electric and transverse-magnetic waves. In the meantime, by employing transparent substrates, including polyvinyl chloride and polyethylene terephthalate, good optical transmittance (80.1%) and flexibility are obtained simultaneously. The reflectivity of a curved metallic surface coated with the proposed curved metamaterial is simulated and measured experimentally. Both results demonstrate excellent absorption performance of the metamaterial, which is highly favored for practical applications.

Cheng Zhang, Jin Yang, Wenkang Cao, Wei Yuan, Junchen Ke, Liuxi Yang, Qiang Cheng, Tiejun Cui. Transparently curved metamaterial with broadband millimeter wave absorption[J]. Photonics Research, 2019, 7(4): 04000478.

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