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Numerical Investigation of Surface Plasmons Associated Subwavelength Optical Single-Pass Effect |
| MIN Chang-Jun;WANG Pei;JIAO Xiao-Jin;MING Hai |
| Institute of Photonics, University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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MIN Chang-Jun, WANG Pei, JIAO Xiao-Jin et al 2007 Chin. Phys. Lett. 24 2922-2925 |
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Abstract Surface plasmons (SPs) associated optical single-pass effect has been investigated in novel subwavelength metallic structures, including single slit and grating structures. With influence of SPs, these metallic structures can enhance transmission in incident direction and suppress it in the opposite direction, exhibiting a single-pass effect. The finite difference time domain method is employed to study the influences of structure parameters on far-field transmission, near-field electric field distribution and extinction ratio of the single-pass transmission effect. A maximal extinction ratio of 47.83dB
is achieved in the grating structure.
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| Keywords:
71.36.+c
73.20.Mf
78.66.Bz
42.25.Fx
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Received: 13 June 2007
Published: 20 September 2007
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| PACS: |
71.36.+c
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(Polaritons (including photon-phonon and photon-magnon interactions))
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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78.66.Bz
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(Metals and metallic alloys)
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42.25.Fx
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(Diffraction and scattering)
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