Reconfigurable Metagratings,ACS Photonics

当前位置： X-MOL 学术 › ACS Photonics › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Reconfigurable Metagratings
ACS Photonics ( IF 6.5 ) Pub Date : 2018-03-12 00:00:00 , DOI: 10.1021/acsphotonics.7b01528
Younes Ra’di ₁ , Andrea Alù _{1,

2,

3,

4}

Affiliation

Recently, it was revealed that gradient metasurfaces based on continuous gradients of the local reflection and/or transmission coefficients are fundamentally limited on their overall efficiency in transformation of an impinging wavefront. In addition, due to the fastly varying impedance profile that these surfaces require, they usually need high-resolution fabrication processes. To address these issues, the concept of metagrating was recently put forward, enabling engineered surfaces capable of manipulating light with unitary efficiency. Metagratings are periodic arrays of carefully designed scatterers that, in contrast with conventional metasurfaces, do not need to support a continuous gradient surface impedance, and consequently, are far simpler to fabricate. Building up on this concept, here we explore opportunities to realize reconfigurable multifunctional metagratings. The proposed designs provide a highly efficient reconfigurable platform tuned by electrostatically biasing simply structured graphene sheets, paving the way to a new generation of highly efficient designer surfaces.

中文翻译：

可重新配置的迁移

近来，揭示了基于局部反射和/或透射系数的连续梯度的梯度超表面在入射波前的变换中的整体效率从根本上受到限制。另外，由于这些表面所需的快速变化的阻抗分布，它们通常需要高分辨率的制造工艺。为了解决这些问题，最近提出了转移的概念，使工程表面能够以单一效率操纵光。偏栅是经过精心设计的散射体的周期性阵列，与常规的超颖表面相反，它们不需要支撑连续的梯度表面阻抗，因此，制造起来要简单得多。建立在这个概念上在这里，我们探索实现可重新配置的多功能中继的机会。拟议的设计提供了一种通过静电偏置简单结构化的石墨烯片进行调整的高效可重构平台，从而为新一代高效设计器表面铺平了道路。

更新日期：2018-03-12

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11