Excitation of surface electromagnetic waves in a graphene-based Bragg grating.

Excitation of surface electromagnetic waves in a graphene-based Bragg grating.
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DOI:
10.1038/srep00737
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发表时间:
2012
期刊:
影响因子:
4.6
通讯作者:
Yu, Ting
Yu, Ting
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Sreekanth, Kandammathe Valiyaveedu;Zeng, Shuwen;Shang, Jingzhi;Yong, Ken-Tye;Yu, Ting

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Here, we report the fabrication of a graphene-based Bragg grating (one-dimensional photonic crystal) and experimentally demonstrate the excitation of surface electromagnetic waves in the periodic structure using prism coupling technique. Surface electromagnetic waves are non-radiative electromagnetic modes that appear on the surface of semi-infinite 1D photonic crystal. In order to fabricate the graphene-based Bragg grating, alternating layers of high (graphene) and low (PMMA) refractive index materials have been used. The reflectivity plot shows a deepest, narrow dip after total internal reflection angle corresponds to the surface electromagnetic mode propagating at the Bragg grating/air boundary. The proposed graphene based Bragg grating can find a variety of potential surface electromagnetic wave applications such as sensors, fluorescence emission enhancement, modulators, etc.
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