Tapered dielectric structure in metal as a wavelength-selective surface plasmon polariton focuser |
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| Authors: | Zhang Yang Zhao Qing Liao Zhi-Min Yu Da-Peng |
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| Affiliation: | State Key Laboratory for Mesoscopic Physics, and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China |
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| Abstract: | Symmetric tapered dielectric structures in metal havedemonstrated applications such as the nanofocusing of surfaceplasmon polaritons, as well as the waveguiding of V-channelpolaritons. Yet the fabrication of smooth-surfaced tapered structureremains an obstacle to most researchers. We have successfullydeveloped a handy method to fabricate metal-sandwiched taperednanostructures simply with electron beam lithography. Though thesestructures are slightly different from conventional symmetricV-shaped structures, systematic simulations show that similarfunctionality of surface plasmon polariton nanofocusing can still beachieved. When parameters are properly selected,wavelength-selective nanofocusing of surface plasmon polaritons canbe obtained. |
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| Keywords: | tapered structure surface plasmon focusing finite-difference time-domain |
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