Cai Yijun, Xu Kai-Da, Feng Naixing, Guo Rongrong, Lin Haijun, Zhu Jinfeng
Opt Express. 2019 Feb 4;27(3):3101-3112. doi: 10.1364/OE.27.003101.
Two-dimensional materials (2DMs) such as graphene and black phosphorus (BP) have aroused considerable attentions in the past few years. Engineering and enhancing their light-matter interaction is possible due to their support for localized surface plasmon resonances in the infrared regime. In this paper, we have proposed an infrared broadband absorber consisting of multilayer graphene-BP nanoparticles sandwiched between dielectric layers. Benefiting from the properties of graphene and BP, the absorber exhibits both perfect broadband responses and strong anisotropy beyond individual graphene and BP layers. The absorber is tunable with the variation of geometric parameters as well as the doping levels of graphene and BP. The physical insight is revealed by electric field distributions. Furthermore, the angular robustness for incident wave is investigated. The proposed anisotropic omnidirectional broadband absorber may have promising potential applications in various biosensing, communication and imaging systems.
诸如石墨烯和黑磷（BP）之类的二维材料（2DMs）在过去几年中引起了相当大的关注。由于它们在红外波段支持局域表面等离子体共振，因此对其光与物质相互作用进行工程设计和增强是可行的。在本文中，我们提出了一种由夹在介电层之间的多层石墨烯 - 黑磷纳米颗粒组成的红外宽带吸收器。受益于石墨烯和黑磷的特性，该吸收器展现出完美的宽带响应以及超越单个石墨烯和黑磷层的强各向异性。该吸收器可随几何参数以及石墨烯和黑磷的掺杂水平的变化而调谐。通过电场分布揭示了其物理原理。此外，还研究了入射波的角度鲁棒性。所提出的各向异性全向宽带吸收器在各种生物传感、通信和成像系统中可能具有广阔的潜在应用前景。
