Open AccessSurface enhanced Raman scattering substrate with metallic nanogap array fabricated by etching the assembled polystyrene spheres array
Author(s) -
Liangping Xia,
Yang Zheng,
Shi Yin,
Wenrui Guo,
Shuhong Li,
Wanyi Xie,
Deping Huang,
Qiling Deng,
Haofei Shi,
Huanqing Cui,
Chunlei Du
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.011349
Subject(s) - materials science , raman scattering , polystyrene , substrate (aquarium) , etching (microfabrication) , raman spectroscopy , finite difference time domain method , scattering , optoelectronics , optics , fabrication , light scattering , nanotechnology , layer (electronics) , composite material , medicine , oceanography , physics , alternative medicine , pathology , geology , polymer
A sensitive surface enhanced Raman scattering (SERS) substrate with metallic nanogap array (MNGA) is fabricated by etching of an assembled polystyrene (PS) spheres array, followed by the coating of a metal film. The substrate is reproducible in fabrication and sensitive due to the nanogap coupling resonance (NGCR) enhancement. The NGCR is analyzed with the finite difference time domain (FDTD) method, and the relationship between the gap parameter and the field enhancement is obtained. Experimental measurements of R6G on demonstrate that the enhancement factor (EF) of the MNGA SERS substrate is increased by more than two fold compared with the control sample.