All-dielectric metasurfaces have been widely used in nanophotonics because of their properties, such as negligible Ohmic loss, stable properties, and flexible fabrication techniques. We propose an all-dielectric metasurface consisting of subwavelength particles, which supports a “trapped” mode after the introduction of adequate symmetry-breaking in the silicon meta-atoms. Coating the metasurface with monolayer graphene enables the adsorption of nucleic acids such as DNA and RNA. We compare the resonant states in the transmission spectrum and find that the proposed metasurface is ultra-sensitive to the surrounding environment and exhibits excellent biosensing performance. Our conclusions indicate that all-dielectric metasurfaces can be a promising platform to realize ultra-sensitive bio-sensors.

中文翻译：

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基于捕获模式全电介质超表面的生物传感器，涂有石墨烯层以增强灵敏度


全介电超表面因其欧姆损耗可忽略、性能稳定和灵活的制造技术等特性而被广泛应用于纳米光子学。我们提出了一种由亚波长粒子组成的全介电超表面，在硅超原子中引入足够的对称性破缺后，它支持“捕获”模式。用单层石墨烯涂覆超表面可以吸附 DNA 和 RNA 等核酸。我们比较了透射光谱中的共振态，发现所提出的超表面对周围环境超敏感，并表现出优异的生物传感性能。我们的结论表明，全介电超表面可以成为实现超灵敏生物传感器的有前途的平台。