Plasmonics

, 6:681

Remote Excitation Polarization-Dependent Surface Photochemical Reaction by Plasmonic Waveguide

  • Mengtao Sun
  • Yanxue Hou
  • Zhipeng Li
  • Liwei Liu
  • Hongxing Xu
Article

Abstract

For the first time, we report remote excitation polarization-dependent surface photochemical reaction by plasmonic waveguide. Remote excitation polarization-dependent surface-enhanced Raman scattering (SERS) spectra indicate a surface photochemical reaction that p-aminothiophenol is converted to p,p′-dimercaptoazobenzene (DMAB) induced by the plasmonic waveguide. Surface plasmon polaritons generated at the end of a silver nanowire can propagate efficiently along the nanowire, and be coupled by nanoparticles near the nanowire as a nanoantenna. Massive electromagnetic enhancement is generated in the nanogap between the nanowire and the nanoparticles. The remote excitation polarization-dependent SERS spectra can be obtained experimentally in the nanogaps; furthermore, the remote excitation polarization-dependent SERS spectra of DMAB reveal the occurrence of this surface catalytic reaction. Theoretical simulations using finite-difference time-domain methods strongly support our experimental results.

Keywords

Remote excitation Polarization-dependent Surface photochemical reaction Plasmonic waveguide 

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Mengtao Sun
    • 1
  • Yanxue Hou
    • 1
    • 2
  • Zhipeng Li
    • 1
    • 3
  • Liwei Liu
    • 4
  • Hongxing Xu
    • 1
    • 5
  1. 1.Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of SciencesBeijingPeople’s Republic of China
  2. 2.College of ScienceYanshan UniversityQinhuangdaoChina
  3. 3.Beijing Key Laboratory of Nano-Photonics and Nano-Structure (NPNS), Department of PhysicsCapital Normal UniversityBeijingPeople’s Republic of China
  4. 4.Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhouPeople’s Republic of China
  5. 5.Division of Solid State PhysicsLund UniversityLundSweden

Personalised recommendations