由激光诱导石墨烯调谐的热可重构硅光栅超表面的类法诺共振

Fano-Like Resonance of Heat-Reconfigurable Silicon Grating Metasurface Tuned by Laser-Induced Graphene.

作者信息

Ma Yukuan, Huang Yulei, Zhu Yuehong, Zhou Hao, Yan Congliao, Wang Shutong, Deng Guoliang, Zhou Shouhuan

机构信息

College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China.

North China Research Institute of Elector-Optics, Beijing 100015, China.

出版信息

Nanomaterials (Basel). 2023 Jan 25;13(3):492. doi: 10.3390/nano13030492.

DOI:10.3390/nano13030492

PMID:36770453

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9918929/

Abstract

We propose a heat-reconfigurable metasurface composed of the silicon-based gold grating. The asymmetric Fano-like line shape is formed due to the mutual coupling of the local surface plasmon (LSP) in the gap between the two layers of Au gratings and the surface propagating plasmon (SPP) on the surface of the Au gratings. Then, we effectively regulate the Fano resonance by applying a bias voltage to laser-induced graphene (LIG), to generate Joule heat, so that the resonant dip of one mode of the Fano resonance can shift up to 28.5 nm. In contrast, the resonant dip of the other mode barely changes. This effectively regulates the coupling between two resonant modes in Fano resonance. Our study presents a simple and efficient method for regulating Fano-like interference in the near-infrared band.

摘要

我们提出了一种由硅基金属光栅组成的热可重构超表面。由于两层金光栅之间间隙中的局域表面等离子体（LSP）与金光栅表面的表面传播等离子体（SPP）相互耦合，形成了类似非对称法诺的线形。然后，我们通过向激光诱导石墨烯（LIG）施加偏置电压以产生焦耳热，有效地调节了法诺共振，使得法诺共振的一个模式的共振凹陷能够向上移动多达28.5纳米。相比之下，另一个模式的共振凹陷几乎没有变化。这有效地调节了法诺共振中两个共振模式之间的耦合。我们的研究提出了一种在近红外波段调节类似法诺干涉的简单有效方法。