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A Thermo-Tunable Metamaterial as an Actively Controlled Broadband Absorber
Engineering ( IF 10.1 ) Pub Date : 2022-11-12 , DOI: 10.1016/j.eng.2022.04.028
Xiao-Chang Xing , Yang Cao , Xiao-Yong Tian , Lingling Wu

Metamaterials have attracted increasing attention in recent years due to their powerful abilities in manipulating electromagnetic (EM) waves. However, most previously reported metamaterials are unable to actively control full-band EM waves. In this paper, we propose a thermo-tunable broadband metamaterial (T-TBM) using paraffin-based composites (PD-Cs) with different phase transition temperatures. Active control of the T-TBM reflection loss peaks from low to high frequency is realized by manipulating the solid–liquid state of the PD-Cs at different phase transition temperatures. The absorption peak bandwidth (where the reflection loss value is less than −30 dB) can be changed, while the broad bandwidth absorption (where the reflection loss value is less than −10 dB) is satisfied by adjusting the temperature of the T-TBM. It is shown that the stagnation of the phase transition temperature of the PD-Cs in the T-TBM provides a time window for actively controlling the EM wave absorption response under different thermal conditions. The device has a broad application prospect in the fields of EM absorption, intelligent metamaterials, multifunctional structural devices, and more.



中文翻译:

作为主动控制宽带吸收器的热可调超材料

近年来,由于超材料在操纵电磁 (EM) 波方面的强大能力,它们引起了越来越多的关注。然而,大多数先前报道的超材料无法主动控制全波段电磁波。在本文中,我们提出了一种使用具有不同相变温度的石蜡基复合材料 (PD-Cs) 的热可调宽带超材料 (T-TBM)。通过在不同相变温度下操纵 PD-C 的固-液状态,实现了从低频到高频的 T-TBM 反射损耗峰值的主动控制。可以改变吸收峰带宽(反射损耗值小于-30 dB),而宽带宽吸收(反射损耗值小于-10 dB)通过调整T-TBM的温度来满足. 结果表明,T-TBM 中 PD-C 相变温度的停滞为主动控制不同热条件下的 EM 波吸收响应提供了一个时间窗口。该器件在电磁吸收、智能超材料、多功能结构器件等领域具有广阔的应用前景。

更新日期:2022-11-12
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