Tailoring of electromagnetic field localizations by two-dimensional graphene nanostructures

Light, Science & Applications
Zebo ZhengNing-Sheng Xu

Abstract

Graphene has great potential for enhancing light-matter interactions in a two-dimensional regime due to surface plasmons with low loss and strong light confinement. Further utilization of graphene in nanophotonics relies on the precise control of light localization properties. Here, we demonstrate the tailoring of electromagnetic field localizations in the mid-infrared region by precisely shaping the graphene into nanostructures with different geometries. We generalize the phenomenological cavity model and employ nanoimaging techniques to quantitatively calculate and experimentally visualize the two-dimensional electromagnetic field distributions within the nanostructures, which indicate that the electromagnetic field can be shaped into specific patterns depending on the shapes and sizes of the nanostructures. Furthermore, we show that the light localization performance can be further improved by reducing the sizes of the nanostructures, where a lateral confinement of λ0/180 of the incidence light can be achieved. The electromagnetic field localizations within a nanostructure with a specific geometry can also be modulated by chemical doping. Our strategies can, in principle, be generalized to other two-dimensional materials, th...Continue Reading

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Citations

Nov 15, 2018·Nanoscale·Petr DvořákTomáš Šikola
May 30, 2019·Science Advances·Zebo ZhengHuanjun Chen
Apr 22, 2020·Nature Communications·Alexander M DubrovkinQi Jie Wang
Jun 8, 2018·Physical Chemistry Chemical Physics : PCCP·Junbo RenJiao-Qing Pan
Dec 18, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Hui-Cong LiHong-Xing Zhang
Feb 22, 2018·Physical Chemistry Chemical Physics : PCCP·Xue-Peng WangHong-Bo Sun
May 4, 2018·ACS Applied Materials & Interfaces·Hao-Bo JiangHong-Bo Sun

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Methods Mentioned

BETA
electron beam lithography
AFM

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