CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Manipulation of Surface Plasmon Polaritons by Phase Modulation of Source Field with Inverse Problem Algorithm |
LIU Chun-Xiang1**, LIANG Guo-Tao1, ZHANG Mei-Na2, LI Zhen-Hua1, CHENG Chuan-Fu1 |
1College of Physics and Electronics, Shandong Normal University, Jinan 250014 2Qilu University of Technology, Jinan 250353
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Cite this article: |
LIU Chun-Xiang, LIANG Guo-Tao, ZHANG Mei-Na et al 2014 Chin. Phys. Lett. 31 057306 |
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Abstract The predetermined field distributions can be achieved by phase modulation of the source field to manipulate the propagation of surface plasmon polaritons (SPPs). The modulations of the radius of the circular slit are according to the phase distributions on the slit, which are calculated by using the Gerchberg–Saxton algorithm with the known field. We design the surface geometric shape of the radius-varied circular slit for exciting the SPP field with the linear, triangular, square and circular distribution characteristics, respectively. The slit structure designed for the circular field distribution is a plasmonic vortex lens that can be used to generate the vortex with the specified size of the primary ring, which shows that this heuristic method has the potential to devise plasmonic devices.
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Published: 24 April 2014
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PACS: |
73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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42.25.Fx
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(Diffraction and scattering)
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52.35.Mw
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(Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))
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04.30.Nk
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(Wave propagation and interactions)
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