1.State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Guangzhou 510275, China
2.State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou 510275, China
3.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
HJ Chen, Email: chenhj8@mail.sysu.edu.cn
SZ Deng, Email: stsdsz@mail.sysu.edu.cn
NS Xu, Email: stsxns@mail.sysu.edu.cn
纸质出版日期:2017-12,
网络出版日期:2017-03-31,
收稿日期:2016-11-14,
修回日期:2017-03-24,
录用日期:2017-03-28
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Tailoring of electromagnetic field localizations by two-dimensional graphene nanostructures[J]. LSA, 2017,6(4).
Zheng, Z. B. et al. Tailoring of electromagnetic field localizations by two-dimensional graphene nanostructures. Light: Science & Applications, 6, e17057 (2017).
Tailoring of electromagnetic field localizations by two-dimensional graphene nanostructures[J]. LSA, 2017,6(4). DOI: 10.1038/lsa.2017.57.
Zheng, Z. B. et al. Tailoring of electromagnetic field localizations by two-dimensional graphene nanostructures. Light: Science & Applications, 6, e17057 (2017). DOI: 10.1038/lsa.2017.57.
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
λ
0
/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
therefore providing new degrees of freedom for designing nanophotonic components capable of tailoring two-dimensional light confinement over a broad wavelength range.
chemical dopingelectromagnetic field localizationsgraphenegraphene nanostructuresgraphene plasmons
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