Polarization-Controlled Plasmonic Structured Illumination

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 exte...

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Bibliographic Details
Published inNano letters Vol. 20; no. 4; pp. 2602 - 2608
Main Authors Tan, Qilong, Xu, Zhengji, Zhang, Dao Hua, Yu, Ting, Zhang, Shuang, Luo, Yu
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 08.04.2020
Subjects
subdiffractional imaging
structured illumination
Plasmonic
metasurface
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Summary: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.
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ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.0c00091