title: High tunability of the surface-enhanced Raman scattering response with a metal-multiferroic composite.
abstract: We demonstrate active control of the plasmonic response from Au nanostructures by the use of a novel multiferroic substrate-LuFe(2)O(4) (LFO)-to tune the surface-enhanced Raman scattering (SERS) response in real time. From both experiments and numerical simulations based on the finite-difference time-domain method, a threshold field is observed, above which the optical response of the metal nanostructure can be strongly altered through changes in the dielectric properties of LFO. This offers the potential of optimizing the SERS detection sensitivity in real time as well as the unique functionality of detecting multiple species of Raman active molecules with the same template.
authors.affiliation: Materials Science and Technology Divisions, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.
authors.forename: Xiaoying
authors.initials: X
authors.lastname: Xu
authors.forename: Katyayani
authors.initials: K
authors.lastname: Seal
authors.forename: Xiaoshan
authors.initials: X
authors.lastname: Xu
authors.forename: Ilia
authors.initials: I
authors.lastname: Ivanov
authors.forename: Chun-Hway
authors.initials: CH
authors.lastname: Hsueh
authors.forename: Nahla Abu
authors.initials: NA
authors.lastname: Hatab
authors.forename: Lifeng
authors.initials: L
authors.lastname: Yin
authors.forename: Xiangqun
authors.initials: X
authors.lastname: Zhang
authors.forename: Zhaohua
authors.initials: Z
authors.lastname: Cheng
authors.forename: Baohua
authors.initials: B
authors.lastname: Gu
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Zhang
authors.forename: Jian
authors.initials: J
authors.lastname: Shen