Department of Mechanical Engineering, Materials Science and Engineering Program, and Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, USA.
Nanoscale. 2018 Oct 4;10(38):18096-18112. doi: 10.1039/c8nr04352c.
Chiral metamaterials have attracted strong interest due to their versatile capabilities in spin-dependent light manipulation. Benefiting from advancements in nanofabrication and mechanistic understanding of chiroptical effects, chiral metamaterials have shown potential in a variety of applications including circular polarizers, chiral sensors, and chiroptical detectors. Recently, chiral metamaterials made by moiré stacking, superimposing two or more periodic patterns with different lattice constants or relative spatial displacement, have shown promise for chiroptical applications. The moiré chiral metamaterials (MCMs) take advantage of lattice-dependent chirality, giving cost-effective fabrication, flexible tunability, and reconfigurability superior to conventional chiral metamaterials. This feature article focuses on recent progress of MCMs. We discuss optical mechanisms, structural design, fabrication, and applications of the MCMs. We conclude with our perspectives on the future opportunities for the MCMs.
手性超材料由于在自旋相关光操纵方面的多功能性而引起了强烈的兴趣。在手性光学效应的纳米制造和机制理解方面的进展的推动下，手性超材料在各种应用中显示出了潜力，包括圆偏振器、手性传感器和手性探测器。最近，通过莫尔堆叠制造的手性超材料（MCM），将两个或更多具有不同晶格常数或相对空间位移的周期性图案叠加在一起，在手性光学应用中显示出了前景。MCM 利用了与晶格相关的手性，具有经济高效的制造、灵活的可调性和可重构性，优于传统的手性超材料。本文重点介绍了 MCM 的最新进展。我们讨论了 MCM 的光学机制、结构设计、制造和应用。最后，我们对 MCM 的未来机遇提出了看法。
