Dielectric metasurfaces have emerged as a powerful platform for novel optical biosensors. Due to their low optical loss and strong light–matter interaction, they demonstrate several exotic optical properties, including sharp resonances, strong near-field enhancements, and the compelling capability to support magnetic modes. They also show advantages such as CMOS-compatible fabrication processes and lower resonance-induced heating compared to their plasmonic counterparts. These unique characteristics are enabling the advancement of cutting-edge sensing techniques for new applications. In this Perspective, we review the recent progress of dielectric metasurface sensors. First, the working mechanisms and properties of dielectric metasurfaces are briefly introduced by highlighting several state-of-the-art examples. Next, we describe the application of dielectric metasurfaces for label-free sensing in three different detection schemes, namely, refractometric sensing, surface-enhanced spectroscopy through Raman scattering and infrared absorption, and chiral sensing. Finally, we provide a perspective for the future directions of this exciting research field.

中文翻译：

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介电超颖表面使先进的光学生物传感器成为可能

介电超表面已经成为新型光学生物传感器的强大平台。由于它们的低光损耗和强的光-质相互作用，因此它们表现出几种奇特的光学特性，包括尖锐的共振，强大的近场增强和强大的支持磁模的能力。与等离子技术相比，它们还显示出诸如CMOS兼容制造工艺和更低的共振感应加热等优势。这些独特的特性使先进的传感技术能够在新的应用中得到发展。在此透视图中，我们回顾了介电超表面传感器的最新进展。首先，通过重点介绍几个最新示例简要介绍介电超表面的工作机理和性能。下一个，我们描述了介电超表面在无标签传感中的三种不同检测方案的应用，即折光传感，通过拉曼散射和红外吸收的表面增强光谱学以及手性传感。最后，我们为这个激动人心的研究领域的未来方向提供了展望。