用于折射率与空间异质性传感的双通道超表面
Dual-channel metasurfaces for refractometric and spatial heterogeneity sensing
浏览论文内容
中文总结 AI 辅助
本文提出一种双通道超表面传感器，利用两个高Q模式分离分析物扰动，同时实现折射率与空间异质性检测，灵敏度达357 nm/RIU，不均匀性分辨率优于λ/10。
中文摘要 AI 辅助
纳米光子传感器通过共振增强的光与物质相互作用放大分析物诱导的光学信号。尽管这类传感器在折射率传感方面行之有效，但传统传感平台通常将分析物分布的空间变化折叠为系综平均读数，从而掩盖了局部异质性。本文提出了一种双通道超表面传感器，能够在深亚波长尺度上同时检测净分析物负载和纳米级空间不均匀性。该器件支持两个具有相反宇称深结构近场分布的不同高Q模式。其互补的模态响应将分析物扰动解耦为体分量和差分分量，并编码到两个光谱可分辨的通道中。我们针对展现出多种纳米级异质性形式的不同分析物构型演示了这些传感模态，实现了357 nm/RIU的折射率灵敏度和低于λ/10的不均匀性检测。这种双通道能力将纳米光子传感从分析物数量扩展到其空间变化，为生物和材料系统的多维分析开辟了新途径。
英文摘要
Nanophotonic sensors amplify analyte-induced optical signals through resonantly enhanced light-matter interactions. While effective for refractometric sensing, conventional sensing platforms typically collapse spatial variations in analyte distributions into ensemble-averaged readouts, thereby obscuring local heterogeneity. Here we present a dual-channel metasurface sensor capable of detecting both net analyte loading and nanoscale spatial inhomogeneity at deep-subwavelength scales. The device supports two distinct high-Q modes with deeply structured near-field profiles of opposite parity. Their complementary modal responses decouple analyte perturbations into bulk and differential components, which are encoded into two spectrally resolvable channels. We demonstrate these sensing modalities across analyte configurations exhibiting diverse forms of nanoscale heterogeneity, achieving a refractometric sensitivity of 357 nm/RIU and inhomogeneity detection below $λ/10$. This dual-channel capability, which extends nanophotonic sensing from analyte quantity to its spatial variation, opens a new avenue for multidimensional analysis of biological and material systems.
发表机构
- University of North Carolina at Charlotte（北卡罗来纳大学夏洛特分校）
机构由 AI 辅助整理，请以论文原文为准。
