Hole shape effect induced optical response to permittivity change in palladium sub-wavelength hole arrays upon hydrogen exposure
Hole shape effect induced optical response to permittivity change in palladium sub-wavelength hole arrays upon hydrogen exposure
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DOI：
10.1063/1.3703664
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发表时间：
2012-04-15
影响因子：
3.2
通讯作者：
Delaunay, Jean-Jacques
中科院分区：
文献类型：
--
作者：
Maeda, Etsuo;Matsuki, Takanori;Delaunay, Jean-Jacques
作为提高检测灵敏度和减小所开发的传感器的尺寸的手段，正在积极地研究使用亚波长孔阵列的传感。利用孔阵列进行感测的方法之一是使用由分析物暴露产生的主透射率峰值的偏移。在本报告中，孔的形状对峰位移的影响进行了研究，以期进一步改善主透射率峰位移。以钯金属为基体，对矩形孔进行了模拟和实验研究。钯介电常数通过暴露于氢而变化，并且产生朝向较长波长的主透射率峰偏移。对传输常数和电场分布的模拟结果表明，矩形孔的短边长度控制着峰值的移动。对于矩形孔，由峰值波长归一化的矩形孔的短边应小于1/10，以实现其最大效果。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.3703664]
Sensing with sub-wavelength hole arrays is being actively researched as a means to improve detection sensitivity and reduce the size of the developed sensor. One of the approaches to sensing with hole arrays is to use a shift of the main transmittance peak generated by analyte exposure. In this report, the effect of the shape of the holes on the peak shift is investigated with a view to improve further the main transmittance peak shift. Rectangular holes are studied by simulation and experiments with a palladium metallic matrix. Palladium permittivity is varied by exposure to hydrogen and generates main transmittance peak shifts toward longer wavelengths. The simulation results of the propagation constant and electric field distribution revealed that the peak shift is controlled by the short side length of the rectangular holes. The short side of the rectangular holes normalized by the peak wavelength should be below 1/10 for the rectangular holes to achieve their maximum effect. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3703664]