Plasmonics

, 6:681

Remote Excitation Polarization-Dependent Surface Photochemical Reaction by Plasmonic Waveguide

Authors

    • Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of Sciences
  • Yanxue Hou
    • Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of Sciences
    • College of ScienceYanshan University
  • Zhipeng Li
    • Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of Sciences
    • Beijing Key Laboratory of Nano-Photonics and Nano-Structure (NPNS), Department of PhysicsCapital Normal University
  • Liwei Liu
    • Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences
  • Hongxing Xu
    • Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of Sciences
    • Division of Solid State PhysicsLund University
Article

DOI: 10.1007/s11468-011-9251-2

Cite this article as:
Sun, M., Hou, Y., Li, Z. et al. Plasmonics (2011) 6: 681. doi:10.1007/s11468-011-9251-2

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