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Enhanced optical transmission through metal films with rotation-symmetrical hole arrays

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5 Author(s)
Wang, Qian-jin ; National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China ; Li, Jia-Qi ; Huang, Cheng-Ping ; Chao Zhang
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The transmission of light through metal surface with subwavelength holes are influenced by many factors, and the rotational symmetry of hole arrays can be one of them. In this paper, we fabricated the hole lattices in metal films with different symmetry and measured the transmission spectra from the visible to near-infrared region. It is found that both the spectrum shape and the transmission efficiency are strongly dependent on the rotational symmetry. The spectrum shape is governed by the reciprocal vectors. And the higher is the symmetry order, the larger the peak efficiency. The results provide us with new insight into the unusual effect.

Published in:

Applied Physics Letters  (Volume:87 ,  Issue: 9 )

Date of Publication:

Aug 2005

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