Three-dimensional structures for enhanced transmission through a metallic film: Annular aperture arrays
Three-dimensional structures for enhanced transmission through a metallic film: Annular aperture arrays
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DOI：
10.1103/physrevb.67.155314
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发表时间：
2003-04
影响因子：
3.7
通讯作者：
F. Baida;D. V. Labeke
中科院分区：
文献类型：
--
作者：
F. Baida;D. V. Labeke
与三年前Ebbesen等人在《自然》391卷，667页（1998年）所观察到的情况相比，通过排列的纳米结构的光传输可以增加。Krishnan等人在《光学通讯》200卷，1页（2001年）中关于金孔光栅所获得的结果得到了证实，但为了提高光传输，提出了一种新的设计。为了获得金属周期性结构在可见光波段的光谱响应，进行了三维时域有限差分模拟。通过用较小直径的同心圆柱填充每个孔的中心区域来修改光栅结构。现在光栅由环形孔径的周期性阵列组成。对这种亚波长银光栅进行了理论模拟。结果表明，在可见光谱范围内，传输效率可达到80%。
Light transmission through arranged nanostructures can be increased comparing to what was observed three years ago by Ebbesen et al. [Nature, 391, 667 (1998)]. The results obtained recently by Krishnan et al. [Opt. Commun. 200, 1 (2001)] with gold hole grating are confirmed, but a new design is suggested in order to enhance the light transmission. A three-dimensional finite difference time domain simulation was performed in order to obtain the spectral response of metallic periodic structures in the visible domain. The grating structure is modified by filling the central region of each hole with a concentric cylinder of smaller diameter. The grating now consists of a periodic array of annular apertures. Theoretical simulations were performed with such a subwavelength silver grating. It is shown that the transmission efficiency can reach 80% in the visible spectral range.