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Title: Excitation of surface electromagnetic waves in a graphene-based Bragg grating
Authors: Sreekanth, K.V.
Zeng, S.
Shang, J.
Yong, K.-T.
Yu, T. 
Issue Date: 2012
Source: Sreekanth, K.V., Zeng, S., Shang, J., Yong, K.-T., Yu, T. (2012). Excitation of surface electromagnetic waves in a graphene-based Bragg grating. Scientific Reports 2 : -. ScholarBank@NUS Repository.
Abstract: 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.
Source Title: Scientific Reports
ISSN: 20452322
DOI: 10.1038/srep00737
Appears in Collections:Staff Publications

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