Broadening of infrared radiation band based on inorganic metamaterials for radiative coolingOA
Radiative cooling(RC)represents a crucial heat dissipation method for spacecraft and electronic devices.In these applications,broader infrared radiation contributes to more efficient cooling.Inorganic materials are extensively employed due to their exceptional resistance to photothermal degradation.However,the narrow infrared intrinsic absorption peaks of these materials present a significant challenge in broadening their radiation bands.This study introduces an innovative square-column metamaterial(SCMM)developed through the integration of a metasurface with an inorganic multilayer film,specifically Si_(3)N_(4)/Al_(2)O_(3)/SiO_(2)/Si_(3)N_(4)/Ag/(etched Si substrate),using optical etching technology.The incorporation of the metasurface structure extends and regulates the radiation band of the inorganic multilayer film from 8-13μm to 8-20μm.Through size adjustment of the square column,the emissivity in the 8-20μm wavelength range increases from 80.3%to 92.1%.The achievement of broad and high infrared radiation is attributed to localized surface plasmon resonance and metal-insulator-metal cavities in the micrometer array.Moreover,the SCMM demonstrates excellent cooling characteristics in actual temperature measurements.This research offers an innovative approach for RC materials to address spectral requirements in specific applications.
Huan Liu;Yingxin Yang;Atsha Ambar;Dongdong Liang;Jie Ren;Zhiqiang Fan;Man Nie;Ying Sun;Cong Wang
School of Energy and Power Engineering,Beihang University,Beijing,100191,ChinaSchool of Energy and Power Engineering,Beihang University,Beijing,100191,ChinaSchool of Physics,Beihang University,Beijing,100191,ChinaSchool of Energy and Power Engineering,Beihang University,Beijing,100191,ChinaSchool of Physics,Beihang University,Beijing,100191,ChinaSchool of Integrated Circuit Science and Engineering,Beihang University,Beijing,100191,ChinaInstitute of New Materials and Advanced Manufacturing,Beijing Academy of Science and Technology,Beijing,100089,ChinaSchool of Physics,Beihang University,Beijing,100191,ChinaSchool of Energy and Power Engineering,Beihang University,Beijing,100191,China School of Integrated Circuit Science and Engineering,Beihang University,Beijing,100191,China National Key Laboratory of Spintronics,Hangzhou International Innovation Institute,Beihang University,Hangzhou,311115,China
通用工业技术
Radiative coolingInorganic metamaterialInfrared radiationOptical etching
《Journal of Materiomics》 2026 (1)
P.19-27,9
supported by the financial support of the National Natural Science Foundation of China(NSFC)[No.52272264]Chinese-German Mobility Programme Project No.M−0273the Fundamental Research Funds for the Central Universities[JK2024-25]the Financial Program of BJAST[No.25CB011-03].
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