TY - JOUR
T1 - Improved surface-enhanced Raman scattering on arrays of gold quasi-3D nanoholes
AU - Yue, Weisheng
AU - Yang, Yang
AU - Wang, Zhihong
AU - Han, Jiaguang
AU - Syed, Ahad A.
AU - Chen, Longqing
AU - Wong, Ka Chun
AU - Wang, Xianbin
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2012/10/4
Y1 - 2012/10/4
N2 - Arrays of gold quasi-3D nanoholes were proposed and fabricated as substrates for surface-enhanced Raman scattering (SERS). By detecting rhodamine 6G (R6G) molecules, the gold quasi-3D nanoholes demonstrated an SERS intensity that was 25-62 times higher than that of two-dimensional nanoholes with the same geometrical shapes and periodicities. The larger SERS enhancement of the quasi-3D nanoholes is attributed to the enhanced electromagnetic field on the top-layer nanohole, the bottom nanodiscs and the field coupling between the two layers. In addition, the investigation of the shape dependence of the SERS on the quasi-3D nanoholes demonstrated that the quadratic, circular, triangular and rhombic holes exhibited different SERS properties. Numerical simulations of the electromagnetic properties on the nanostructures were performed with CST Microwave Studio, and the results agree with the experimental observations. © 2012 IOP Publishing Ltd.
AB - Arrays of gold quasi-3D nanoholes were proposed and fabricated as substrates for surface-enhanced Raman scattering (SERS). By detecting rhodamine 6G (R6G) molecules, the gold quasi-3D nanoholes demonstrated an SERS intensity that was 25-62 times higher than that of two-dimensional nanoholes with the same geometrical shapes and periodicities. The larger SERS enhancement of the quasi-3D nanoholes is attributed to the enhanced electromagnetic field on the top-layer nanohole, the bottom nanodiscs and the field coupling between the two layers. In addition, the investigation of the shape dependence of the SERS on the quasi-3D nanoholes demonstrated that the quadratic, circular, triangular and rhombic holes exhibited different SERS properties. Numerical simulations of the electromagnetic properties on the nanostructures were performed with CST Microwave Studio, and the results agree with the experimental observations. © 2012 IOP Publishing Ltd.
UR - http://hdl.handle.net/10754/562359
UR - https://iopscience.iop.org/article/10.1088/0022-3727/45/42/425401
UR - http://www.scopus.com/inward/record.url?scp=84867241745&partnerID=8YFLogxK
U2 - 10.1088/0022-3727/45/42/425401
DO - 10.1088/0022-3727/45/42/425401
M3 - Article
SN - 0022-3727
VL - 45
SP - 425401
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 42
ER -