Opt Lett. 2023 Jun 1;48(11):2969-2972. doi: 10.1364/OL.489627.
A multipolar silicon-based resonant meta-surface scheme is proposed and numerically presented via intercalating oblique slits into the silicon patches, leading to an ultra-sharp resonant spectrum via the excitation of electric and magnetic quadrupoles and their hybridization coupling. High-performance electro-optical modulator is demonstrated, showing a spectrally shifted modulation sensitivity up to 1.546 nm/V. Moreover, novel, to the best of our knowledge, optical sensing for ion solution concentration with the detection limitation down to 5.15 × 10 is demonstrated as another application. These findings provide an impressive strategy for resonant silicon-based nano-photonics and opto-electronic devices.
提出并数值演示了一种基于多极硅的共振超表面方案，通过在硅片上插入倾斜狭缝，通过电和磁四极子的激发及其杂化耦合，产生超尖锐的共振光谱。演示了高性能电光调制器，其光谱移动调制灵敏度高达 1.546nm/V。此外，作为另一种应用，我们还展示了一种新颖的、据我们所知的用于离子溶液浓度检测的光学传感器，检测极限低至 5.15×10。这些发现为基于共振硅的纳米光子学和光电设备提供了一种令人印象深刻的策略。
