Dynamic plasmonic tweezers enabled single-particle-film-system gap-mode Surface-enhanced Raman scattering

作者：Shen, Junfeng; Wang, Jian; Zhang, Cuijiao; Min, Changjun; Fang, Hui^*; Du, Luping; Zhu, Siwei; Yuan, X. -C.

来源：Applied Physics Letters, 2013, 103(19): 191119.

DOI：10.1063/1.4829617

• EVANESCENT BESSEL BEAM
• NANOPARTICLES
• POLARIZATION
• EXCITATION
• ARRAYS

Based on numerical simulation and experiment, we demonstrate a dynamic single-particle-film Surface-enhanced Raman scattering (SERS) system enabled by manipulation of a single gold nanoparticle by plasmonic nano-tweezers (PNT). A corresponding dynamic plasmonic gap-mode is induced by the hybridization of the surface plasmon polaritons (SPPs) on the film and the localized surface plasmon of the particle. This gap-mode produces an additional enhancement of similar to 10(4) compared to the bare SPPs without the particle, reaching a final SERS enhancement factor of similar to 10(9). Enabled by nano-manipulation with PNT, this dynamic single-particle-film-system provides a promising route to controllable SERS detection in aqueous environments.

• 出版日期2013-11-4
• 单位南开大学; 深圳大学; 天津市人民医院; 南阳理工学院