Zhengai Chen, Zhengji Wen, Zhixuan Wu, Yanqing Gao, Chong Tan, Zhixiang Deng, Xiaowen Li, Dongjie Zhou, Feng Liu, Jiaming Hao, Zhiming Huang, Ning Dai, Yan Sun
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Inverse-Designed Broadband Ultrathin Aperiodic Metacoatings Spanning from Deep Ultraviolet to Near Infrared
The ability to actively control broadband light absorption and reflection ranging from deep-ultraviolet (DUV) to near-infrared (NIR), is crucial for various optical and optoelectronic applications. Herein, a novel type of ultrathin, lithography-free, and broadband aperiodic thin-film metamaterial coatings (metacoatings) is inverse-designed from DUV to NIR (190–1700 nm), which is composed of a series of deeply subwavelength tungsten oxide layers with graded refractive index profiles (by varying the deposited Ar gas pressures from 0.1 to 3.0 Pa) above an opaque aluminum layer. Experimental results show that these proposed aperiodic metacoatings can realize a transition from broadband strong absorption (as-deposited state) to high reflection (annealed state) from visible (VIS) to NIR (400–1700 nm), through thermal annealing techniques. The aperiodic metacoatings have an overall thickness of just ≈200 nm, with angle-insensitive up to 70° as well as are polarization-independent. Furthermore, vivid structural colors can be generated by rearranging the aperiodic tungsten oxide layers and finally employed in color display applications. These aperiodic metacoatings offer a very promising platform for many applications such as broadband photodetectors, thermophotovoltaics, information encryption devices, etc.
期刊介绍:
Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications.
As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics.
The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.