Li Menghan, Liu Muhan, Chen Yuxuan, Hu Zheng-Da, Wu Jingjing, Wang Jicheng
School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi, 214122, China.
State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China.
Nanoscale Res Lett. 2022 Sep 2;17(1):81. doi: 10.1186/s11671-022-03720-5.
Metasurface can use artificial microstructures to manipulate electromagnetic waves more accurately and flexibly. All-dielectric metalens have a wide range of materials and low cost so it has a wide application prospect. Herein, we propose a all-dielectric achromatic metalens built with Si as the structural unit that can operate over a broadband of wavelengths in the visible region. It controls the wavefront of light through the Pancharatnam-Berry phase and propagation phase to eliminate the chromatic aberration. Meanwhile, we also use Gerchberg-Saxton algorithm and its improved algorithm to iterate over multiple design wavelengths and obtain holographic phases suitable for broadband. Thus, both the metalenses and holographic metasurfaces can achieve achromatic broadband in the visible light range, which provides a new method for the development of meta-optical imaging devices.
超表面可以利用人工微结构更精确、灵活地操纵电磁波。全介质超透镜具有材料种类丰富和成本低的特点，因此具有广阔的应用前景。在此，我们提出一种以硅为结构单元构建的全介质消色差超透镜，其可在可见光区域的宽波长范围内工作。它通过潘查拉特纳姆-贝里相位和传播相位来控制光的波前，以消除色差。同时，我们还使用格尔奇伯格-萨克斯顿算法及其改进算法在多个设计波长上进行迭代，以获得适用于宽带的全息相位。因此，超透镜和全息超表面都可以在可见光范围内实现消色差宽带，这为超光学成像器件的发展提供了一种新方法。
