连续体中的双带绑定状态基于表面格子共振的杂交
Xiang Du1,2,3, Lei Xiong2,3,4, Xueqian Zhao2,3,5
1College of Physics and Electronic Information, Anhui Normal University, Wuhu 241000, China.
Nanophotonics (Berlin, Germany)
|December 5, 2024
概括
我们展示了一种新方法,用于在元表面中在连续体 (BIC) 中创建双带绑定状态. 这些BIC为先进的光学应用提供了超高质量因素和可调节性质.
科学领域:
- 光子学和元材料研究
- 纳米光子学 纳米光子学
- 光学物理学 光学物理学
背景情况:
- 连续性的边界状态 (BIC) 是基本的波现象,在传感和激光中具有潜在的应用.
- 超表面为操纵纳米尺度光线提供了一个多功能平台.
- 实现具有高质量因素和可调性双频段BIC仍然是一个挑战.
研究的目的:
- 提出并实验证明一种新的策略,用于在元表面中实现双带对称性保护的BIC.
- 为了研究 Mie 表面格子共振 (SLR) 在周期性双部分纳米盘阵列中的混合化,用于 BIC 生成.
- 探索光谱分离和产生的准BIC质量因子的可调性.
主要方法:
- 制造和定性周期性双部分纳米盘阵列与位移的中央纳米盘.
- 对光学光谱进行实验测量,以确定双频段BIC和准BIC.
- 数字模拟用于分析BIC属性,灵敏度和优点数字.
- 系统地改变纳米盘直径和格子周期以调整BIC特征.
主要成果:
- 双带电四极和磁二极BIC的演示,过渡到准BIC,测量质量因子高达1240.
- 通过调整纳米盘直径或晶格周期,方便调整准BIC的光谱分离和质量因子.
- 通过使用双带准BIC,实现超过480nm/RIU的批量灵敏度和高达1200的优点数字.
- 在不同直径的非移位中央纳米盘的二分纳米盘阵列中观察电二极管BIC (次辐射SLR).
结论:
- 拟议的战略为在元表面中实现和精确调整双带BIC提供了一条新的途径.
- 实现的超高Q准BIC对非线性光学,多模式激光和先进光学传感的应用具有前景.
- 这项工作推进了在元表面中设计光学共振的设计原则.
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