论文标题
通过连续体中的绑定状态在临界耦合处进行工程光吸收
Engineering light absorption at critical coupling via bound states in the continuum
论文作者
论文摘要
纳米光子学的最新进展是由使用等离激元和介电结构中高质量共振在二维（2D）材料中设计光 - 物质相互作用的愿望所驱动的。在这里，我们演示了临界耦合处的辐射控制与连续体（BIC）物理学中的基于元面的结合状态之间的联系，并开发了一种广义理论，以在耦合共振元面积中锻炼2D材料的光吸收。在混合石墨烯二元偏移的典型示例中，我们通过同时调整由BIC和石墨烯表面电导率控制的硅谐振器的不对称参数，而吸收效率维持最大的硅表面电导率，通过同时调节硅谐振器的不对称参数来对吸收带宽进行操纵。这项工作揭示了BIC在临界耦合时在辐射控制中的普遍作用，并为高效光电设备应用（例如，光发射，检测和调制）提供了2D材料工程光吸收的有希望的策略。
Recent progress in nanophotonics is driven by the desire to engineer light-matter interaction in two-dimensional (2D) materials using high-quality resonances in plasmonic and dielectric structures. Here, we demonstrate a link between the radiation control at critical coupling and the metasurface-based bound states in the continuum (BIC) physics, and develop a generalized theory to engineer light absorption of 2D materials in coupling resonance metasurfaces. In a typical example of hybrid graphene-dielectric metasurfaces, we present the manipulation of absorption bandwidth by more than one order of magnitude by simultaneously adjusting the asymmetry parameter of silicon resonators governed by BIC and the graphene surface conductivity while the absorption efficiency maintains maximum. This work reveals the generalized role of BIC in the radiation control at critical coupling and provides promising strategies in engineering light absorption of 2D materials for high-efficiency optoelectronics device applications, e.g., light emission, detection and modulation.
