Deep-groove nickel gratings for solar thermal absorbers
Deep-groove nickel gratings for solar thermal absorbers
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DOI：
10.1088/2040-8978/18/10/105901
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发表时间：
2016-09
影响因子：
2.1
通讯作者：
N. Ahmad;S. Núñez-Sánchez;Jonathan R. Pugh;M. Cryan
中科院分区：
文献类型：
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作者：
N. Ahmad;S. Núñez-Sánchez;Jonathan R. Pugh;M. Cryan
本文介绍了在450-950 nm波长范围内的深槽镍纳米光栅的光学吸收率和反射率的测量和建模。该结构已使用聚焦离子束蚀刻和其特征在于使用傅立叶光谱和光栅上的场分布进行了研究，使用有限差分时域建模。基于聚焦离子束横截面模拟了真实的光栅结构，测量结果与模拟结果吻合良好。表面等离子体激元和狭缝模式的作用突出显示在强宽带吸收，可以实现与这些结构。
This paper presents measured and modelled optical absorptance and reflectance for deep-groove nickel nano-gratings in the 450–950 nm wavelength range. The structures have been fabricated using focused ion beam etching and characterised using Fourier spectroscopy and the field distributions on the gratings have been studied using finite difference time domain modelling. Realistic grating structures have been modelled based on focused ion beam cross sections and these results are in good agreement between measured and modelled results. The roles of surface plasmon polaritons and slot modes are highlighted in the strong broadband absorbance that can be achieved with these structures.