Excitation of surface electromagnetic waves in a graphene-based Bragg grating.
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.
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore-637371.
Kandammathe Valiyaveedu
KV
Sreekanth
Shuwen
S
Zeng
Jingzhi
J
Shang
Ken-Tye
KT
Yong
Ting
T
Yu
D060733:Electromagnetic Radiation; D006108:Graphite / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry; D012031:Refractometry; D013499:Surface Properties
D006108:Graphite; D019904:Polymethyl Methacrylate