PhotoniX (Oct 2022)

Single-color peripheral photoinhibition lithography of nanophotonic structures

  • Minfei He,
  • Zhimin Zhang,
  • Chun Cao,
  • Yiwei Qiu,
  • Xiaoming Shen,
  • Guozun Zhou,
  • Zixin Cai,
  • Xinjie Sun,
  • Xin He,
  • Liang Xu,
  • Xi Liu,
  • Chenliang Ding,
  • Yaoyu Cao,
  • Cuifang Kuang,
  • Xu Liu

DOI
https://doi.org/10.1186/s43074-022-00072-2
Journal volume & issue
Vol. 3, no. 1
pp. 1 – 14

Abstract

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Abstract Advances in direct laser writing to attain super-resolution are required to improve fabrication performance and develop potential applications for nanophotonics. In this study, a novel technique using single-color peripheral photoinhibition lithography was developed to improve the resolution of direct laser writing while preventing the chromatic aberration characteristics of conventional multicolor photoinhibition lithography, thus offering a robust tool for fabricating 2D and 3D nanophotonic structures. A minimal feature size of 36 nm and a resolution of 140 nm were achieved with a writing speed that was at least 10 times faster than existing photoinhibition lithography. Super-resolution and fast scanning enable the fabrication of spin-decoupled metasurfaces in the visible range within a printing duration of a few minutes. Finally, a subwavelength photonic crystal with a near-ultraviolet structural color was fabricated to demonstrate the potential of 3D printing. This technique is a flexible and reliable tool for fabricating ultracompact optical devices.

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