Fabry-Pérot (FP) interference cavity for which the interference property is controlled by the tuning of the cavity length is widely used in many fields. However, in nanophotonic device applications, the physical length cannot be changed easily. In this work, the optical response of a simple antenna/spacer/reflector structure is investigated and it is found that the nanoparticle antenna metasurface acting as a FP reflection interface will tune the effective FP interference cavity length. Using both simulation and experiment, the hybridization of nanodisks, the reflection film, plasmon lattice, and the FP cavity is investigated. The results show that because of the hybridization, the effective FP cavity length is adjustable by the plasmon resonances. The plasmonic tunable nanocavity is highly beneficial for the design of a wide variety of nanophotonic devices in applications, such as broadband optical absorption, wavelength selective antireflective layers, and sensing devices, and is also promising for use in electronic ink panel displays.

中文翻译：

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等离子体等离子体纳米表面调节法布里-珀罗干涉腔长度，用于纳米光子器件设计

通过干涉腔长度的调节来控制干涉特性的法布里-珀罗（FP）干涉腔在许多领域得到了广泛使用。然而，在纳米光子器件的应用中，物理长度不能轻易改变。在这项工作中，研究了一种简单的天线/间隔物/反射器结构的光学响应，发现用作FP反射界面的纳米粒子天线超表面将调整有效FP干涉腔的长度。通过仿真和实验，研究了纳米盘，反射膜，等离激元晶格和FP腔的杂交。结果表明，由于杂交，有效FP腔长度可通过等离振子共振来调节。