Coherent resonance of quantum plasmons in the graphene-gold cluster hybrid system
Coherent resonance of quantum plasmons in the graphene-gold cluster hybrid system
复制标题
石墨烯-金簇杂化系统中量子等离子体的相干共振
DOI：
10.1039/c4cp05049e
复制
发表时间：
2015
影响因子：
3.3
通讯作者：
Chikang Li
中科院分区：
文献类型：
--
作者：
KB Zhang;Hong Zhang（通讯作者）;Chikang Li
贵金属纳米颗粒可以改变石墨烯的光学性质。本文利用含时密度泛函理论（TDDFT）对石墨烯-金团簇杂化体系中量子等离子体激元的相干共振进行了详细的理论分析。这种等离激元相干效应主要归因于石墨烯和金团簇之间的电磁场耦合。其结果是，该混合系统的光学响应表现出显着的强，可选择的调谐和偏振相关的等离子体共振增强在宽的频率区域。这项研究提供了一个更好的理解等离子体增强效应在石墨烯基光电器件。
Noble metal nanoparticles can modify the optical properties of graphene. Here we present a detailed theoretical analysis of the coherent resonance of quantum plasmons in the graphene–gold cluster hybrid system by using time dependent density functional theory (TDDFT). This plasmon coherent effect is mainly attributed to the electromagnetic field coupling between the graphene and the gold cluster. As a result, the optical response of the hybrid system exhibits a remarkably strong, selectable tuning and polarization dependent plasmon resonance enhanced in wide frequency regions. This investigation provides an improved understanding of the plasmon enhancement effect in a graphene-based photoelectric device.