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Bioinspired Gyrotropic Metamaterials with Multifarious Wave Adaptability and Multifunctionality
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-04-15 , DOI: 10.1002/adom.202000012 Lingxi Huang 1 , Yuping Duan 1 , Jia Liu 1 , Yuansong Zeng 2 , Guojia Ma 2 , Huifang Pang 1 , Shaohua Gao 3 , Weiping Zhang 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-04-15 , DOI: 10.1002/adom.202000012 Lingxi Huang 1 , Yuping Duan 1 , Jia Liu 1 , Yuansong Zeng 2 , Guojia Ma 2 , Huifang Pang 1 , Shaohua Gao 3 , Weiping Zhang 1
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Electromagnetic wave loss caused by rotating polarization of chiral structures has long been considered as a disadvantage in transmission, detection, etc., however, it can be turned to benefit in microwave absorbing materials to enhance absorption. Herein, inspired by the chiral structure of jeweled beetles, gyrotropic metamaterials (MMs) are designed and prepared, and experimentally demonstrate the enhanced microwave absorption by rotating polarization; the bandwidth of absorptivity greater than 80% (reflection loss, RL ≤ −7 dB) covers the entire 4–18 GHz frequency range under an ultralow surface density of 1.45 kg m−2; the mechanism analyzed and verified by simulation models demonstrates this a universal method. A new paradigm of MMs fabricated by high entropy alloy (HEA) is offered in this work, which increases the freedom of MM design and promotes the integration of material science and physics. Multifarious wave adaptability and multifunctionality achieved by integrated HEA unit cell and foamed polyurethane realize ultrasonic and water wave absorption, as well as impact and corrosion resistance. These designs hold great promise for facilitating functionally integrated materials for stealth technology, antiterrorist, encryption, sensing, and photon detection.
中文翻译：
具有多种波适应性和多功能性的生物启发型回旋超材料
长期以来，由手性结构的旋转极化引起的电磁波损失一直被认为是传输，检测等方面的缺点，但是，可以转向微波吸收材料以增强吸收。在此，受珠宝甲虫手性结构的启发，设计并制备了回旋超材料（MMs），并通过旋转极化实验证明了增强的微波吸收。在1.45 kg m -2的超低表面密度下，吸收率带宽大于80％（反射损耗，RL≤-7 dB）覆盖了整个4-18 GHz频率范围; 仿真模型分析和验证的机理证明了这种通用方法。这项工作提供了一种由高熵合金（HEA）制成的MM的新范例，它增加了MM设计的自由度，并促进了材料科学和物理的融合。通过集成的HEA单元电池和泡沫聚氨酯实现的多种波适应性和多功能性实现了超声波和水波吸收以及抗冲击和耐腐蚀性能。这些设计为促进功能集成材料的隐形技术，反恐，加密，传感和光子检测提供了广阔的前景。
更新日期：2020-06-19
中文翻译：
具有多种波适应性和多功能性的生物启发型回旋超材料
长期以来，由手性结构的旋转极化引起的电磁波损失一直被认为是传输，检测等方面的缺点，但是，可以转向微波吸收材料以增强吸收。在此，受珠宝甲虫手性结构的启发，设计并制备了回旋超材料（MMs），并通过旋转极化实验证明了增强的微波吸收。在1.45 kg m -2的超低表面密度下，吸收率带宽大于80％（反射损耗，RL≤-7 dB）覆盖了整个4-18 GHz频率范围; 仿真模型分析和验证的机理证明了这种通用方法。这项工作提供了一种由高熵合金（HEA）制成的MM的新范例，它增加了MM设计的自由度，并促进了材料科学和物理的融合。通过集成的HEA单元电池和泡沫聚氨酯实现的多种波适应性和多功能性实现了超声波和水波吸收以及抗冲击和耐腐蚀性能。这些设计为促进功能集成材料的隐形技术，反恐，加密，传感和光子检测提供了广阔的前景。
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