Fabrication oflarge-scale metamaterial sheet for negative refraction

要实现大规模的超材料薄片，使我们能够用肉眼观察负折射，超材料单元部件的批量制造技术是必不可少的。在本项目中，开发了利用不同材料对外部磁场的磁响应性差异的磁性组装技术。分析预测了自组装单元结构与元件尺寸和磁化率之间的关系。实验得到的结构与数值预测很好地吻合。数值研究了从近红外到可见光的单元结构的波长定标策略。

Technologies for bulk fabrication of unit components of metamaterial is indispensable for realization of large-scale metamaterial sheet which enables us to observe negative refraction with naked eyes. In this project, magnetic assembly technique which utilizes differences of magnetic responsiveness of various materials to external magnetic field is developed. Relationship between self-assembled unit structures and component’s sizes and magnetic susceptibilities are analytically predicted. Experimentally obtained structures were well coincident with numerical predictions. The wavelength-scaling strategies of a unit structure between near-infrared to visible wavelengths are numerically investigated.