光学学报, 2019, 39 (1): 0131001, 网络出版: 2019-05-10
光学薄膜塔姆态诱导石墨烯近红外光吸收增强 下载: 1659次
Near-Infrared Light Absorption Enhancement in Graphene Induced by the Tamm State in Optical Thin Films
薄膜 光学薄膜 石墨烯 塔姆等离激元 光吸收 thin films optical thin films graphene Tamm plasmon polaritons light absorption
摘要
提出了一种增强石墨烯光吸收率的布拉格光栅/石墨烯/金属薄膜光学结构。运用传输矩阵和时域有限差分法研究了其光传输特性,发现布拉格光栅与金属薄膜之间形成的塔姆等离激元局域场可有效增强光与石墨烯的相互作用,单层石墨烯的近红外光吸收率约增大了36倍。探讨了布拉格光栅的周期、石墨烯位置、入射角度、布拉格光栅层厚度及石墨烯化学势与石墨烯光吸收的关系。研究结果表明,上述物理参数的变化可有效调控石墨烯的光吸收波长及效率。研究结果为高性能石墨烯探测器等新型光电子器件的实现提供了新的途径。
Abstract
A Bragg grating/graphene/metallic thin film-type optical structure is prepared to enhance light absorption in graphene, and the optical propagation properties of the structure are investigated using the transfer matrix and finite-difference time-domain methods. The light-graphene interaction can be effectively enhanced using strongly confined Tamm plasmon polaritons formed between the Bragg grating and metallic film. Thus, an approximately 36-fold increase could be observed in the near-infrared light absorption of the graphene. Additionally, the dependence of graphene absorption on the Bragg grating period number, graphene position, angle of incident light, thickness of the Bragg grating layers, and chemical potential of the graphene is investigated. The results show that the wavelength and efficiency of light absorption in graphene can be controlled by adjusting the aforementioned physical parameters. The results of this study provide a new pathway for realizing high-performance graphene devices, especially photodetectors.
黎志文, 陆华, 李扬武, 焦晗, 赵建林. 光学薄膜塔姆态诱导石墨烯近红外光吸收增强[J]. 光学学报, 2019, 39(1): 0131001. Zhiwen Li, Hua Lu, Yangwu Li, Han Jiao, Jianlin Zhao. Near-Infrared Light Absorption Enhancement in Graphene Induced by the Tamm State in Optical Thin Films[J]. Acta Optica Sinica, 2019, 39(1): 0131001.