Polarization-Controlled Plasmonic Structured Illumination,Nano Letters

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Polarization-Controlled Plasmonic Structured Illumination
Nano Letters ( IF 9.6 ) Pub Date : 2020-03-10 , DOI: 10.1021/acs.nanolett.0c00091
Qilong Tan ₁ , Zhengji Xu ₂ , Dao Hua Zhang ₃ , Ting Yu ₄ , Shuang Zhang ₁ , Yu Luo ₄

Affiliation

Structured light in the subwavelength scale is important for a broad range of applications ranging from lithography to imaging. Of particular importance is the ability to dynamically shift the pattern of the fields, which has led to the development of structured illumination microscopy. Further extension of structured illumination to plasmonic systems has enabled imaging beyond diffraction limit. However, structured illumination usually requires complicated optical setups entailing moving mechanical parts. Here a polarization tunable structured plasmonic field (SPF) is proposed and experimentally demonstrated. The SPF is formed by surface plasmon interference (SPI) generated by a fishbone-shaped metasurface on a thin gold film. Importantly, the SPF can be continuously shifted by merely varying the linear polarization state of an incident beam. The precise control of the fringes of structured illumination and elimination of mechanical control will have great potential in subdiffractional imaging for practical applications.

中文翻译：

偏振控制的等离子结构照明

亚波长尺度的结构光对于从光刻到成像的广泛应用非常重要。尤其重要的是能够动态改变场的图案，这导致了结构照明显微镜的发展。将结构化照明进一步扩展到等离激元系统使成像超出了衍射极限。但是，结构化照明通常需要复杂的光学设置，从而需要移动的机械零件。在这里，提出了极化可调谐结构化等离子体场（SPF）并进行了实验验证。SPF是由薄金膜上的鱼骨形超表面所产生的表面等离子体激元干扰（SPI）形成的。重要的是，仅通过改变入射光束的线性偏振态就可以连续移动SPF。

更新日期：2020-04-24

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