期刊
OPTICAL MATERIALS EXPRESS
卷 10, 期 2, 页码 682-692出版社
Optica Publishing Group
DOI: 10.1364/OME.383383
关键词
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资金
- National Natural Science Foundation of China [61504078]
- China Postdoctoral Science Founda-tion [2015M571545]
We proposed a metamaterial absorber composed of an array of trapezoid multilayered grating Au and InP on top of an opaque substrate, which covers two atmosphere-transparent-window bands with appropriate modulation of geometric parameters. The absorption higher than 0.8 is from 3.5 to 4.8 mu m and 7 to 14.3 mu m. From the effective medium theory and dispersion relation, the reason of the broad-band absorption is the first and third order slow light effect respectively, which is verified by the electromagnetic and thermal loss distribution further. This absorber may greatly promote the practical application of absorbers in double-color infrared imaging, detecting, infrared stealth and sub-ambient passive radiative cooling by thermal emitting. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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