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在连续体中的高Q准束状态在特拉赫兹全metasurfaces

Ruiqing Jiao¹, Qing Wang¹, Jianjun Liu¹

¹Centre for THz Research, China Jiliang University, Hangzhou 310018, China.

|October 28, 2023

概括

全元表面利用连续性的束状态 (BICs) 实现特拉赫兹应用的高质量 (Q) 因素. 研究人员通过改变气孔对称性,在这些光子设备中展示了可调整的Q因子.

科学领域:

光子学是一个光子学.
超材料是什么?超材料是什么?
特拉赫兹技术的技术.

背景情况:

连续体中的边界状态 (BIC) 提供高质量 (Q) 因素,对于先进的光子设备至关重要.
全超表面由于其独特的共振特性,正在为太赫兹 (THz) 应用获得吸引力.

研究的目的:

为THz频率提出并实验证明一个全BIC超表面.
研究引导模式共振 (GMR) 和它们的Q因子的激发和操纵.
探索这些高Q超表面在THz设备中的潜力.

主要方法:

数值调查由雷利衍射诱导的GMRs在metagratings.
实验性制造一个全元表面,在Si基板上设置一个空气孔阵列.
通过通过空气孔修改打破格子对称性的GMR和Q因子的分析.

主要成果:

BICs起源于由 (1,0) 和 (1,1) 雷利衍射诱导的低阶TE和TMGMRs.
通过改变气孔位置或半径,GMR及其Q因子很容易被激发和调整.
响应频率对破坏对称性的修改表现出最小的灵敏度.
在GMR中,测量Q因子高达490得到了实现.

结论:

展示的全BIC超表面为高QTHz应用提供了一个有前途的平台.
通过对称性操纵,可调整的GMR和Q因子能够精确控制设备性能.
这些高Q超表面有可能用于THz调制器,生物传感器和其他光子设备.

关键词:

完全消耗电的地表变压器连续体中的束状态.引导模式共振的指导模式.太赫兹 (Terahertz) 是一个频率.

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