Open AccessDoubly resonant surface-enhanced Raman scattering on gold nanorod decorated inverse opal photonic crystals
Author(s) -
Le Dac Tuyen,
An Chi Liu,
Chün-chieh Huang,
Pei-Cheng Tsai,
Jian Hung Lin,
Chin-Wei Wu,
Lai-Kwan Chau,
Tzyy Schiuan Yang,
Le Quoc Minh,
Hung-Chih Kan,
Chia Chen Hsu
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.029266
Subject(s) - nanorod , materials science , raman scattering , photonic crystal , optics , raman spectroscopy , substrate (aquarium) , plasmon , nanophotonics , excitation , optoelectronics , photonics , scattering , light scattering , surface plasmon , laser , nanotechnology , physics , oceanography , quantum mechanics , geology
We present a novel type of surface-enhanced Raman scattering (SERS) substrate constituted of a 3-dimensinal polymeric inverse opal (IO) photonic crystal frame with gold nanorods (Au-NRs) decorating on the top layer. This substrate employs resonant excitation as well as constructive backward scattering of Raman signals to produce large enhancement of SERS output. For the incoming excitation, Au-NRs with appropriate aspect ratio were adopted to align their longitudinal localized surface plasmon band with the excitation laser wavelength. For the outgoing SERS signal, the spectral position of the photonic band gap was tuned to reflect Raman-scattered light constructively. This SERS substrate produces not only strong but also uniform SERS output due to the well control of Au-NRs distribution by the periodic IO structure, readily suitable for sensing applications.