Optimizing Metasurface-Component Performance by Improving Transmittance and Phase Match of the Nanopillars
Xiaohong Sun,
Shuang Huo,
He Yang,
Mengmeng Yan,
Jianing Zhai,
Saili Zhao,
Yong Zeng
Affiliations
Xiaohong Sun
Henan Key Laboratory of Laser and Optoelectronic Information Technology, The School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China
Shuang Huo
Henan Key Laboratory of Laser and Optoelectronic Information Technology, The School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China
He Yang
Henan Key Laboratory of Laser and Optoelectronic Information Technology, The School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China
Mengmeng Yan
Henan Key Laboratory of Laser and Optoelectronic Information Technology, The School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China
Jianing Zhai
Henan Key Laboratory of Laser and Optoelectronic Information Technology, The School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China
Saili Zhao
Henan Key Laboratory of Laser and Optoelectronic Information Technology, The School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China
Yong Zeng
Henan Key Laboratory of Laser and Optoelectronic Information Technology, The School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou 450001, China
In the propagation phase of a dielectric metasurface, there are two important problems. Firstly, the range of transmittance of the nanopillars for a building metasurface is usually between 60% and 100%, which reduces the metasurface’s overall transmittance and affects the uniformity of the transmitted light. Secondly, the realistic phase provided by the nanopillar cannot be matched very well with the theoretical phase at each lattice location.The phase difference (between a realistic phase and theoretical phase) may reach tens of degrees. Here, we propose an interesting method to solve these problems. With this new method, a metalens is designed in this paper. The nanopillars for building the metalens have transmittance over 0.95, which increases the metalens transmittance and improves the light uniformity. In addition, with the new method, the phase differences of all elements in the metalens can also be reduced to be below 0.05°, decreasing the metalens spherical aberration dramatically. This method not only helps us to optimize the metalens but also provides a useful way for designing high-quality metasurfaces.
