论文标题
对称破裂引起的耦合纳米Fabry-Perot结构中的深色模型激发
Dark-modes excitation in coupled nano Fabry-Perot structure induced by symmetry breaking
论文作者
论文摘要
吸收的超材料引起了广泛的兴趣，但遭受了金属欧姆的损失，将其Q因子限制在10个左右的值中。在本文中，我们报告了由几个单独的nano-fabry-perot结构构成支持低点的nano-fabry-perot结构的工程和实验性表征。所得共振的Q因子高于20，几乎完全吸收。此外，我们还证明，可以通过在同一亚波长度内利用各对纳米Fabry-perot共振器的耦合来同时激发几种暗模式共振。最后，共振的Q因子单调取决于元图的厚度，并且可以达到高达85的值。
Absorbing metamaterials have attracted a widespread interest but suffer from the metallic ohmic losses that limits their Q-factor to values around 10. In this paper, we report the engineering and experimental characterization of a high Q dark-mode in a metasurface resulting from the coupling of several individual nano-Fabry-Perot structures supporting low-contrast resonances. The resulting resonance has a Q-factor above 20 and a nearly total absorption. Moreover, we also demonstrate that several dark-mode resonances can be excited simultaneously, by exploiting the coupling of various pairs of nano Fabry-Perot resonators within the same subwavelength period. Finally, the resonance's Q-factor depends monotonously on the thickness of the metasurface and can reach values up to 85.
