Li Shihao, Chen Kejian, Zhang Dajun, Chen Yan, Xu Yeli, Liu Ji, Wang Xiong, Zhuang Songlin
Opt Express. 2020 Nov 9;28(23):34804-34811. doi: 10.1364/OE.410309.
A reconfigurable metamaterial for chirality switching and selective intensity modulation is demonstrated experimentally. Through simple folding strategy, nonchiral state, single-band chiral states and dual-bands chiral states can be switched. Circular dichroism up to 0.94 is measured with folding angles of 70°. Meanwhile, selective intensity modulation is realized by the combined effect of folding angle and incident angle. The transmission intensity of circularly polarized waves can be modulated by more than 90% at any selected resonating frequency between 8.97 and 10.73 GHz. This work will benefit the researches of foldable metamaterials and have potential applications in the field of reconfigurable devices.
实验展示了一种用于手性切换和选择性强度调制的可重构超材料。通过简单的折叠策略，可以切换非手性状态、单波段手性状态和双波段手性状态。在折叠角度为70°时，测得的圆二色性高达0.94。同时，通过折叠角和入射角的联合效应实现了选择性强度调制。在8.97至10.73 GHz之间的任何选定共振频率下，圆偏振波的传输强度可被调制超过90%。这项工作将有利于可折叠超材料的研究，并在可重构器件领域具有潜在应用。
