Large-Area Fabrication of Complex Nanohole Arrays with Highly Tunable Plasmonic Properties
Large-Area Fabrication of Complex Nanohole Arrays with Highly Tunable Plasmonic Properties
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DOI：
10.1021/acsami.0c06936
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发表时间：
2020-08-19
影响因子：
9.5
通讯作者：
Zhao, Yiping
中科院分区：
文献类型：
--
作者：
Wang, Yanfeng;Chong, Harrison B.;Zhao, Yiping
采用微球光刻和斜角沉积相结合的方法，在基底上形成了大面积的非对称复合银纳米孔阵列。该技术能够生产复杂的纳米孔阵列，具有可控的孔直径，厚度和孔内的棒结构。复合非对称银纳米孔结构显示出很强的偏振相关光学特性，并在近红外区域观察到一种新的具有可调共振波长的异常光透射（EOT）模式。在新的EOT波长区域的透射率可以从纳米孔的27%增加到化合物结构的69%，并且这些结构可以实现高达847 nm RIU-1的折射率灵敏度。可调谐的EOT波长和强偏振相关的光学特性使该结构成为可调谐光学滤波器、偏振器、表面增强光谱学等的理想材料。
By combining nanosphere lithography with oblique angle deposition, large-area asymmetric compound Ag nanohole arrays with nanorods inside the hole were patterned on substrates. The technique enabled the production of complex nanohole arrays with controlled hole diameter, thickness, and rod structure inside the hole. The compound asymmetric Ag nanohole structures showed strong polarization-dependent optical properties, and a new extraordinary optical transmission (EOT) mode with tunable resonance wavelength at the near-IR region was observed. The transmission at the new EOT wavelength region can increase from 27% of nanohole to 69% of the compound structure, and these structures can achieve a refractive index sensitivity as high as 847 nm RIU-1. The tunable EOT wavelength and strong polarization-dependent optical properties make the structure ideal for ultrathin optical filters, polarizers, surface-enhanced spectroscopies, etc.