Abstract
One intriguing metamaterial absorber with anapole excitation in the microwave frequency range is proposed for the first time. The presented subwavelength structure is composed of three copper strips to effectively improve the absorptivity. Owing to the constructive interference between toroidal and electric dipoles, and all-right impedance matching with free space, the absorptivity can reach 77% at 10.27 GHz with structural parameter optimization. The simulated and experimental results show strong consistency. The anapole absorption could have numerous potential applications at microwave, terahertz, and optical frequencies, such as cloaking, ultrasensitive sensing, and secure information transfer.
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