石墨烯覆盖的金纳米孔阵列中增强的光-物质相互作用
Enhanced light-matter interaction in graphene-covered gold nanovoid arrays
摘要：
目前正在探索石墨烯与贵金属纳米结构的组合，用于通过等离子体增强的强光-石墨烯相互作用。我们介绍了一种新的混合石墨烯-金属系统，用于研究在可见光范围内表现出共振的金空纳米结构的光-物质相互作用。石墨烯层与纳米空隙阵列的等离子体振子模式的强耦合导致底层等离子体振子共振的显著频率偏移，使得在单层石墨烯中超过30%的绝对光吸收和石墨烯的拉曼响应的高达700倍的增强。这些新的视角使我们能够验证金空阵列上石墨烯的存在，增强甚至使我们能够准确地量化层数。数值模拟和微扰理论分析进一步支持了实验观测。石墨烯金空平台有利于分子的传感，并且将R6 G染料分子置于石墨烯顶部，我们观察到R6 G拉曼指纹的强烈增强。这些结果为表面增强拉曼散射（SERS）的先进基底铺平了道路，具有在原子定义良好的石墨烯层上进行明确的单分子检测的潜力。
英文摘要：
The combination of graphene with noble-metal nanostructures is currently being explored for strong light-graphene interaction enhanced by plasmons. We introduce a novel hybrid graphene-metal system for studying light-matter interactions with gold-void nanostructures exhibiting resonances in the visible range. Strong coupling of graphene layers to the plasmon modes of the nanovoid arrays results in significant frequency shifts of the underlying plasmon resonances, enabling more than 30% absolute light absorption in a single layer of graphene and up to 700-fold enhancement of the Raman response of the graphene. These new perspectives enable us to verify the presence of graphene on gold-void arrays and the enhancement even allows us to accurately quantify the number of layers. Experimental observations are further supported by numerical simulations and perturbation-theory analysis. The graphene gold-void platform is beneficial for sensing of molecules and placing R6G dye molecules on top of the graphene, we observe a strong enhancement of the R6G Raman fingerprints. These results pave the way toward advanced substrates for surface-enhanced Raman scattering (SERS) with potential for unambiguous single-molecule detection on the atomically well-defined layer of graphene.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
