非对称环境中正入射等离子体超表面的窄表面晶格共振
Narrow Surface-Lattice Resonance of Plasmonic Metasurfaces at Normal Incidence in Asymmetric Environment.
摘要(中文译文)
表面晶格共振（surface lattice resonance, SLR）是实现等离激元纳米结构中高Q值共振的关键机制。然而，激发过程中所需的斜入射或折射率匹配条件使其在实际应用中面临挑战。作为解决方案，我们通过巧妙激发普通金纳米棒的高阶多极模式与面外共振，在实验上展示了正入射及非对称环境下的SLR超表面，在1 μm波段实现了Q值为47、共振透射峰为0.43的效果。我们探究了结构参数对SLR特性的影响，为有效调控透射响应以及实现从透射谷到透射峰的转变提供了思路。得益于SLR系统强光-物质相互作用，我们实验验证了体灵敏度为1014 nm/RIU的线性折射率传感，同时观测到二次谐波产生相对于同等厚度无图案金膜80倍的相对增强，以及可观的三阶饱和吸收响应。我们的工作为定制窄带等离激元SLR超表面提供了一种简单高效的策略，在传感、非线性光学、脉冲光学及其他领域具有广阔的应用潜力。
Abstract
Surface lattice resonance (SLR) is a key mechanism for achieving high-Q resonances in plasmonic nanostructures. However, the oblique incidence or refractive-index matching required during excitation makes it challenging in practical applications. As a solution, we demonstrate SLR metasurfaces under normal incidence and in an asymmetric environment, with a Q-factor of 47 and a resonant transmission peak of 0.43 in the 1-μm band in experiments, by skillfully exciting the high-order multipole modes and out-of-plane resonance of ordinary gold nanorods. The influence of structural parameters on SLR characteristics is explored, providing insight into the effective regulation of the transmission response and achieving the transition from a transmission dip to a transmission peak. Benefiting from the strong light-matter interaction of the SLR systems, we experimentally demonstrate linear refractive index sensing with a bulk sensitivity of 1014 nm/RIU, along with an 80-times relative enhancement (compared with an unpatterned Au film of the same thickness) in second harmonic generation and an appreciable third-order saturable absorption response. Our work provides a simple and efficient strategy to tailor narrow-band plasmonic SLR metasurfaces, enabling promising potential in sensing, nonlinear optics, pulse optics, and other fields.
如何引用
AMA
Hailun Xie, Lili Gui, Yuxin Li, Hao Chen, Zhongshan Zhang, Kun Xu. Narrow Surface-Lattice Resonance of Plasmonic Metasurfaces at Normal Incidence in Asymmetric Environment.. ACS applied materials & interfaces. 2026; doi:10.1021/acsami.6c09316.
APA
Hailun Xie, Lili Gui, Yuxin Li, Hao Chen, Zhongshan Zhang, Kun Xu (2026). Narrow Surface-Lattice Resonance of Plasmonic Metasurfaces at Normal Incidence in Asymmetric Environment.. ACS applied materials & interfaces. https://doi.org/10.1021/acsami.6c09316
GB/T 7714
Hailun Xie, Lili Gui, Yuxin Li, Hao Chen, Zhongshan Zhang, Kun Xu. Narrow Surface-Lattice Resonance of Plasmonic Metasurfaces at Normal Incidence in Asymmetric Environment.[J]. ACS applied materials & interfaces, 2026 doi:10.1021/acsami.6c09316.
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