| Extraordinary optical transmission through a subwavelength composite hole-pillar array |
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| 作者姓名： | 邵伟佳 李为民 许小亮 王会杰 吴以治 郁菁 |
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| 作者单位： | National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology,University of Science and Technology of China;Department of Physics, University of Science and Technology of China |
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| 摘 要： | We numerically investigate the transmission properties of a subwavelength composite hole-pillar array. As the radius of the pillar increases, the transmission properties experience a complex evolution. It is found that the magnetic dipole resonance of the pillar suppresses the surface plasmon polariton resonance(SPPR) at the gold-air interface. There are two strong transmission peaks associated with the magnetic dipole resonance of pillar and SPPR at the gold-silica interface. A peak associated with magnetic quadrupole resonance of the pillar is observed. Moreover, there is a weak peak associated with the coupling between the whispering-gallery plasmon(WGP) mode and magnetic dipole. Our work is helpful for making a dual band optical filter.
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| 关 键 词： | pillar silica plasmon dipole radius dielectric gallery metallic cylindric fabricating |
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