College of Information Science & Electronic Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China.
Sci Rep. 2017 Jun 6;7(1):2899. doi: 10.1038/s41598-017-03205-x.
Controlling the loss of graphene can be used in the field of transformation optics. We propose a new concept of electromagnetic fence on a monolayer graphene surface plasmon polariton platform. Using a Dot-Density-Renderer quasicrystal metasurface, we can simulate the absorption of gradient index optics structures. Numerical simulations show that the incident waves to our designed electromagnetic fence are trapped toward the central lines and quickly absorbed by the high-loss region. Two basic types of electromagnetic fence and its composite structures have been designed and analyzed, which exhibit excellent broadband absorbing performances at 8 THz-12 THz. Because of its advantages in controlling the soft-boundary effects and easy manufacturing characteristics, the proposed electromagnetic fence seems very promising for THz-frequency-transformation plasmonics applications.
控制石墨烯的损耗可应用于变换光学领域。我们在单层石墨烯表面等离激元平台上提出了一种电磁围栏的新概念。利用点密度渲染准晶体超表面，我们可以模拟梯度折射率光学结构的吸收。数值模拟表明，入射波被我们设计的电磁围栏束缚在中心线上，并被高损耗区域迅速吸收。设计并分析了两种基本类型的电磁围栏及其复合结构，它们在 8 THz-12 THz 频率范围内表现出优异的宽带吸收性能。由于其在控制软边界效应和易于制造方面的优势，所提出的电磁围栏似乎非常有前途用于太赫兹频转换等离子体学应用。
