Jiang Xiaoyun, Wang Tao, Xiao Shuyuan, Yan Xicheng, Cheng Le
Opt Express. 2017 Oct 30;25(22):27028-27036. doi: 10.1364/OE.25.027028.
We numerically demonstrate a novel monolayer graphene-based perfect absorption multi-layer photonic structure by the mechanism of critical coupling with guided resonance, in which the absorption of graphene can significantly reach 99% at telecommunication wavelengths. The highly efficient absorption and spectral selectivity can be obtained with designing structural parameters in the near-infrared region. Compared to previous works, we achieve the complete absorption of single-atomic-layer graphene in the perfect absorber with a lossless dielectric Bragg mirror, which not only opens up new methods of enhancing the light-graphene interaction, but also makes for practical applications in high-performance optoelectronic devices, such as modulators and sensors.
我们通过临界耦合与导模共振机制，数值演示了一种基于单层石墨烯的新型完美吸收多层光子结构，其中石墨烯在电信波长下的吸收率可显著达到99%。通过设计近红外区域的结构参数，可以实现高效吸收和光谱选择性。与先前的工作相比，我们在具有无损介质布拉格镜的完美吸收器中实现了单原子层石墨烯的完全吸收，这不仅开辟了增强光与石墨烯相互作用的新方法，也有利于在调制器和传感器等高性能光电器件中的实际应用。
