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

被引：101

作者：

Sreekanth, Kandammathe Valiyaveedu ^{[1
]}

Zeng, Shuwen ^{[2
,3
]}

Shang, Jingzhi ^{[1
]}

Yong, Ken-Tye ^{[2
]}

Yu, Ting ^{[1
,4
]}

机构：

[1] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore

[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

[3] CINTRA CNRS NTU THALES, UMI 3288, Singapore 637553, Singapore

[4] Natl Univ Singapore, Fac Sci, Dept Phys, Singapore 117542, Singapore

来源：

SCIENTIFIC REPORTS | 2012年 / 2卷

基金：

新加坡国家研究基金会;

关键词：

ENHANCEMENT; PROPAGATION; PLASMONICS; CONSTANT; MODES; FILMS;

D O I：

10.1038/srep00737

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：7

共 46 条

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