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Plasmonics

, 6:681 | Cite as

Remote Excitation Polarization-Dependent Surface Photochemical Reaction by Plasmonic Waveguide

  • Mengtao SunEmail author
  • 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 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (grant nos. 90923003, 10874234, 20703064, and 10904171). We thank Dr. Steven L. Suib for helpful suggestions.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Mengtao Sun
    • 1
    Email author
  • 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

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