Open AccessThin Multispectral Camouflage Absorber Based on Metasurfaces with Wide Infrared Radiative Cooling Window
Author(s) -
Qin Zheng,
Zhang Chen,
Liang Zhongzhu,
Meng Dejia,
Shi Xiaoyan,
Yang Fuming
Publication year - 2022
Publication title -
advanced photonics research
Language(s) - English
Resource type - Journals
ISSN - 2699-9293
DOI - 10.1002/adpr.202100215
Subject(s) - camouflage , infrared , multispectral image , optics , materials science , emissivity , microwave , molar absorptivity , metamaterial , broadband , optoelectronics , wavelength , radiative transfer , remote sensing , physics , computer science , telecommunications , geology , artificial intelligence
Herein, a hierarchical metamaterial (HMM) is reported to achieve multispectral camouflage for thermal infrared detectors and radar. The HMM consists of a frequency‐selective emitter (FSE) integrated with a microwave absorber (MA). The FSE layer has an average absorptivity of 0.18, 0.85, and 0.18 in the wavelength of 3–5, 5–8, and 8–14 μm, respectively, in the case of the normal incidence. The absorptivity of MA maintains more than 91% (87%) in the broadband of 8–12 GHz (the entire X‐band) up to incident angles of ± 40 °for TM (TE) polarization. Overall, the average surface emissivity of HMM is 0.25, 0.86, and 0.26 in the infrared broadband of 3–5, 5–8, and 8–14 μm, respectively. The FSE considers infrared camouflage and infrared radiative cooling. The performance of HMM in microwave range remains unchanged, compared to MA structure without FSE layer. From the point of view of thickness, the HMM structure is only 2.34 mm. These excellent performances indicate that the herein described proposed HMM has promising applications in multispectral camouflage fields.