Light transmission by subwavelength annular aperture arrays in metallic films
Light transmission by subwavelength annular aperture arrays in metallic films
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DOI：
10.1016/s0030-4018(02)01690-5
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发表时间：
2002-08-01
影响因子：
2.4
通讯作者：
Van Labeke, D
中科院分区：
文献类型：
--
作者：
Baida, FI;Van Labeke, D
我们研究了金属薄膜与雕刻的二维周期性结构的环形孔的光谱响应。我们表明，可以获得增强的传输，可以达到90%。的光谱响应作为膜厚度的函数从150 nm的值为1.8 μ m的变化也进行了研究。我们表明，在亚波长同轴结构的导模是负责这个大的传输。利用3D-FDTD算法研究了阵列的光学参数和几何参数（周期、同轴半径、入射极化方向和介电常数）对传输特性的影响。(C)出版社：Elsevier Science B. V.
We study the spectral response of a metallic film with an engraved 2D periodic structure of annular apertures. We show that an enhanced transmission can be obtained and can reach 90%. The variation of the spectral response as a function of the film thickness from 150 nm to a value of 1.8 mum is also studied. We show that a guided mode in the subwavelength coaxial structure is responsible for this large transmission. A wavelength cut-off exists, We study the transmission characteristics on the optical and geometrical parameters of the array (period, coaxial radii, incident polarization and dielectric constants) using a 3D-FDTD algorithm. (C) 2002 Published by Elsevier Science B.V.