RGB Achromatic Metalens Doublet for Digital Imaging

Autor:	Weibin Feng, Jianchao Zhang, Qinfei Wu, Augusto Martins, Qian Sun, Zhihao Liu, Yong Long, Emiliano R. Martins, Juntao Li, Haowen Liang
Rok vydání:	2022
Předmět:	Mechanical Engineering Image Processing Computer-Assisted ENGENHARIA ELÉTRICA Color Humans General Materials Science Bioengineering General Chemistry Condensed Matter Physics Lenses
Zdroj:	Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP
ISSN:	1530-6992
Popis:	Chromatic aberration is a major challenge faced by metalenses. Current methods to achieve broadband achromatic operation in metalenses usually suffer from limited size, numerical aperture, and working bandwidth due to the finite group delay of meta-atoms, thus restricting the range of practical applications. Multiwavelength achromatic metalenses can overcome those limitations, making it possible to realize larger numerical aperture (NA) and sizes simultaneously. However, they usually require three layers, which increases their fabrication complexity, and have only been demonstrated in small sizes, with low numerical aperture and modest efficiencies. Here, we demonstrate a 1 mm diameter red-green-blue achromatic metalens doublet with a designed NA of 0.8 and successfully apply the metalens in a digital imaging system. This work shows the potential of the doublet metasurfaces, extending their applications to digital imaging systems such as digital projectors, virtual reality glasses, high resolution microscopies, etc.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bcb8988320befd1ed2860da3ffd3af7 https://pubmed.ncbi.nlm.nih.gov/35506587 Zobrazit plný text záznamu