Transmission characteristics of metallic equilateral triangular nanohole arrays
Transmission characteristics of metallic equilateral triangular nanohole arrays
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DOI：
10.1063/1.2355468
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发表时间：
2006-09-18
影响因子：
4
通讯作者：
Moyer, Patrick J.
中科院分区：
文献类型：
--
作者：
Kim, Je Hong;Moyer, Patrick J.
透射光谱通过阵列的等边三角形纳米孔显示显着的传输增加，对于大多数条件下，当归一化的面积比和相比，圆形和方形孔。此外，当用相同周期的圆形和方形阵列观察时，三角形孔的光谱特征偶尔会发生偏移。作者注意到，对于相同面积的孔，三角形孔的周长比方形孔的周长大约75%，比圆形孔的周长大约100%，这表明孔的周边区域可能在纳米孔的传输特性中发挥比先前注意到的更大的作用。作者认为，孔内金属表面积的相应增加导致孔内支持的等离子体激元发挥更大的作用。作者还提出，孔径阵列的周期性导致衍射效应，这也影响了透射光的复杂光谱特性。最后，对于非常小的孔（直径小于100 nm），三角形形状的重要性减弱。(c)2006年，美国物理学会。
Transmission spectra through arrays of equilateral triangular nanoapertures show significant transmission increases for most conditions when normalized to the area ratio and compared to those of circular and square apertures. Also, the spectral features of the triangular holes are occasionally shifted when viewed with circular and square arrays of the same periodicity. The authors note that for apertures of the same area, the circumference of a triangular hole is about 75% larger than that of a square hole and about 100% larger than that of a circular hole, indicating that the perimeter region of the apertures may play a larger role in the transmission characteristics of nanoholes than has previously been noted. The authors suggest that the corresponding increase in metal surface area inside the apertures leads to a larger role played by the plasmon which is supported inside the apertures. The authors also suggest that the periodicity of the aperture arrays leads to diffraction effects which also affect the complex spectral characteristics of the transmitted light. Finally, for very small holes (less than 100 nm in diameter), the significance of the triangular shape is diminished. (c) 2006 American Institute of Physics.