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Extreme‐Angle Silicon Infrared Optics Enabled by Streamlined Surfaces
Author(s) -
Zhang Fei,
Pu Mingbo,
Li Xiong,
Ma Xiaoliang,
Guo Yinghui,
Gao Ping,
Yu Honglin,
Gu Min,
Luo Xiangang
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202008157
Subject(s) - materials science , infrared , optics , optoelectronics , silicon , fabrication , broadband , diffraction , diffraction efficiency , grating , physics , medicine , alternative medicine , pathology
Infrared optical systems are indispensable in almost all domains of society, but their performances are often restricted by bulky size, small field of view, large thermal sensitivity, high fabrication cost, etc. Here, based on the concept of catenary optics, a novel isophase streamline optimization approach is leveraged to design silicon complementary metal–oxide–semiconductor (CMOS)‐compatible metasurfaces with broadband, wide‐angle, and high‐efficiency performances, which breaks through the glass ceiling of traditional optical technologies. By using the truly local geometric phase, a maximum diffraction efficiency approaching 100% is obtained in ultrawide spectral and angular ranges. Somewhat surprising results are shown in that wide‐angle diffraction‐limited imaging and laser beam steering can be realized with a record field of view up to 178°. This methodology is scalable to the entire optical band and other materials, enabling unprecedented compact infrared systems for surveillance, unmanned vehicles, medical science, etc.