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Graphene–silver hybrid metamateria for tunable narrow-band perfect absorption and reflection at visible waveband
Journal of Nanophotonics ( IF 1.5 ) Pub Date : 2021-06-01 , DOI: 10.1117/1.jnp.15.026005
Hongyong Huang 1
Affiliation  

We proposed a hybrid metamaterial structure based on graphene–silver, which has tunable, efficient light-absorbing, and light-transmitting performance at the visible light regime. It is shown that this hybrid metamaterial structure can absorb light effectively with a maximum of 97.2% at a wavelength of 638 nm and reflect light effectively with a maximum of 98.05% at a wavelength of 437 nm. In addition, the two peak wavelength can be adjusted flexibly by grid voltage. This nearly perfect absorption capability is attributed to the synergetic effects of the localized surface plasmon enhancement of Ag nanoribbon, graphene plasmonics, metal–insulator–graphene mode, and Fabry–Perot resonance. There are almost no physical effects, only reflection when the reflection peak wavelength light goes into and out of the material. When the Fermi energy of graphene increases with the increase of grid voltage, the peaks wavelength of absorption and reflection will be blue shifted. This kind of tunable metamaterial can be used in visible light photodetectors or spectroscopy fields.

中文翻译:

石墨烯-银混合超材料用于可见波段可调窄带完美吸收和反射

我们提出了一种基于石墨烯-银的混合超材料结构,该结构在可见光范围内具有可调、高效的吸光和透光性能。结果表明,这种混合超材料结构在638 nm波长处的有效吸收率最高为97.2%,在437 nm波长处有效反射率最高为98.05%。此外,两个峰值波长可以通过栅极电压灵活调整。这种近乎完美的吸收能力归因于银纳米带的局部表面等离子体增强、石墨烯等离子体、金属-绝缘体-石墨烯模式和法布里-珀罗共振的协同效应。几乎没有物理效应,只有反射峰值波长光进出材料时的反射。当石墨烯的费米能量随着栅极电压的增加而增加时,吸收和反射的峰值波长将发生蓝移。这种可调谐超材料可用于可见光光电探测器或光谱领域。
更新日期:2021-06-04
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