The Role of Periodicity in Enhanced Transmission through Subwavelength Hole Arrays
The Role of Periodicity in Enhanced Transmission through Subwavelength Hole Arrays
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DOI：
10.1088/0256-307x/23/2/059
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发表时间：
2006-02
影响因子：
3.5
通讯作者：
S. Mei;Tian Jie;Zhi-Yuan Li;Bing-Ying Cheng;Dao-Zhong Zhang;Ai-Zi Jin;Haifang Yang
中科院分区：
文献类型：
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作者：
S. Mei;Tian Jie;Zhi-Yuan Li;Bing-Ying Cheng;Dao-Zhong Zhang;Ai-Zi Jin;Haifang Yang
设计了金属薄膜中的两种亚波长孔阵列，以验证周期性在光增强传输中的重要作用。测量的光谱表明，准周期孔阵列在707纳米处呈现出一个增强的透射峰，透射强度约为20%，而无定形孔阵列未发现等离子体共振峰。当准周期结构中的孔径减小时，透射峰的位置略有移动，且透射率下降。这些现象表明长程结构有序性（特别是周期性）在辅助入射光波与金属结构的表面等离子体模式耦合方面具有重要作用。
Two kinds of subwavelength hole arrays in metallic films are designed to verify the important role of the periodicity in enhanced transmission of light. The measured optical spectra show that the quasiperiodic hole arrays exhibit an enhanced transmission peak centred at 707 nm with a transmission intensity of about 20%, while no plasmon resonance peak is found for the amorphous hole arrays. When the hole diameter decreases in the quasiperiodic structure, the position of the transmission peak shifts slightly, and the transmittance drops. These phenomena indicate the important role of the long-range structural order (particularly the periodicity) in assisting the coupling of incident light wave with the surface plasmon modes of the metallic structures.