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首页> 外文期刊>Optics Letters >Proximity effect assisted absorption enhancement in thin film with locally clustered nanoholes
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Proximity effect assisted absorption enhancement in thin film with locally clustered nanoholes

机译：邻近效应有助于局部聚集纳米孔薄膜的吸收增强

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摘要

We focus on the light-trapping characteristics of a thin film with locally clustered nanoholes (NHs), considering that the clustering effect is usually encountered in preparing the nanostructures. Our full-wave finite-element simulation indicates that an intentionally introduced clustering effect could be employed for improving the light-trapping performance of the nanostructured thin film. For a 100 nm thick amorphous silicon film, an optimal clustering design with NH diameter of 100 nm is able to double the integrated optical absorption over the solar spectrum, compared to the planar counterpart, as well as show much improved optical performance over that of the nonclustered setup. A further insight into the underlying physics explains the outstanding light-trapping capability in terms of the increased available modes, a stronger power coupling efficiency, a higher fraction of electric field concentrated in absorbable material, and a higher density of photon states. (C) 2015 Optical Society of America.
机译：考虑到在制备纳米结构时通常会遇到聚集效应，我们着眼于具有局部聚集的纳米孔（NHs）的薄膜的光捕获特性。我们的全波有限元模拟表明，有意引入的聚类效应可用于改善纳米结构薄膜的光捕获性能。对于100 nm厚的非晶硅膜，与平面对应物相比，NH直径为100 nm的最佳聚类设计能够使太阳光谱上的积分光吸收翻倍，并且显示出比平顶膜更好的光学性能。非集群设置。对潜在物理学的进一步了解，从可用模式的增加，更强的功率耦合效率，更高比例的聚集在可吸收材料中的电场以及更高的光子态密度方面解释了出色的光捕获能力。 （C）2015年美国眼镜学会。

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