Lu Chunyu, Wang Jicheng, Yan Shubin, Hu Zheng-Da, Zheng Gaige, Yang Liu
School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China.
Science and Technology on Electronic Test and Measurement Laboratory, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China.
Materials (Basel). 2017 Jun 26;10(7):699. doi: 10.3390/ma10070699.
We present plasmonic devices, consisting of periodic arrays of graphene nanoribbons (GNRs) and a graphene sheet waveguide, to achieve controllable plasmon-induced transparency (PIT) by numerical simulation. We analyze the bright and dark elements of the GNRs and graphene-sheet waveguide structure. Results show that applying the gate voltage can electrically tune the PIT spectrum. Adjusting the coupling distance and widths of GNRs directly results in a shift of transmission dips. In addition, increased angle of incidence causes the transmission to split into multiple PIT peaks. We also demonstrate that PIT devices based on graphene plasmonics may have promising applications as plasmonic sensors in nanophotonics.
我们通过数值模拟展示了由石墨烯纳米带（GNR）的周期性阵列和石墨烯片波导组成的等离子体器件，以实现可控的等离子体诱导透明（PIT）。我们分析了GNR和石墨烯片波导结构的亮部和暗部元素。结果表明，施加栅极电压可以电调谐PIT光谱。调整GNR的耦合距离和宽度直接导致传输凹陷的移动。此外，入射角的增加会使传输分裂为多个PIT峰。我们还证明，基于石墨烯等离子体的PIT器件作为纳米光子学中的等离子体传感器可能具有广阔的应用前景。
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