中国物理B ›› 2009, Vol. 18 ›› Issue (11): 4865-4869.doi: 10.1088/1674-1056/18/11/041

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Tapered dielectric structure in metal as a wavelength-selective surface plasmon polariton focuser

张洋, 赵清, 廖志敏, 俞大鹏   

  1. State Key Laboratory for Mesoscopic Physics, and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China
  • 收稿日期:2009-04-19 修回日期:2009-05-30 出版日期:2009-11-20 发布日期:2009-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 90606023, 10574003 and 20731160012), a National 973 Project (Grant No 2007CB936202 and 2009CB623703) and MOST from China's Ministry of Science and Technology and Hong Kong's NSFC/RGC Joint Research Scheme (Project No N_-HKUST615/06).

Tapered dielectric structure in metal as a wavelength-selective surface plasmon polariton focuser

Zhang Yang(张洋),Zhao Qing(赵清),Liao Zhi-Min(廖志敏), and Yu Da-Peng(俞大鹏)†   

  1. State Key Laboratory for Mesoscopic Physics, and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China
  • Received:2009-04-19 Revised:2009-05-30 Online:2009-11-20 Published:2009-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 90606023, 10574003 and 20731160012), a National 973 Project (Grant No 2007CB936202 and 2009CB623703) and MOST from China's Ministry of Science and Technology and Hong Kong's NSFC/RGC Joint Research Scheme (Project No N_-HKUST615/06).

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摘要： Symmetric tapered dielectric structures in metal have demonstrated applications such as the nanofocusing of surface plasmon polaritons, as well as the waveguiding of V-channel polaritons. Yet the fabrication of smooth-surfaced tapered structure remains an obstacle to most researchers. We have successfully developed a handy method to fabricate metal-sandwiched tapered nanostructures simply with electron beam lithography. Though these structures are slightly different from conventional symmetric V-shaped structures, systematic simulations show that similar functionality of surface plasmon polariton nanofocusing can still be achieved. When parameters are properly selected, wavelength-selective nanofocusing of surface plasmon polaritons can be obtained.

Abstract: Symmetric tapered dielectric structures in metal have demonstrated applications such as the nanofocusing of surface plasmon polaritons, as well as the waveguiding of V-channel polaritons. Yet the fabrication of smooth-surfaced tapered structure remains an obstacle to most researchers. We have successfully developed a handy method to fabricate metal-sandwiched tapered nanostructures simply with electron beam lithography. Though these structures are slightly different from conventional symmetric V-shaped structures, systematic simulations show that similar functionality of surface plasmon polariton nanofocusing can still be achieved. When parameters are properly selected, wavelength-selective nanofocusing of surface plasmon polaritons can be obtained.

Key words: tapered structure, surface plasmon, focusing, finite-difference time-domain

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
71.36.+c (Polaritons (including photon-phonon and photon-magnon interactions)) 81.16.Nd (Micro- and nanolithography)