{"title":"双介电层宽带广角LIWR完美吸收器","authors":"Xiao Lin Wang, Lu Zhu, Yuan Yuan Liu","doi":"10.1007/s11468-023-01879-w","DOIUrl":null,"url":null,"abstract":"<div><h2>Abstract\n</h2><div><p>The wide-bandwidth infrared absorbers of metamaterials have a wide range of applications in thermal emission and imaging. But achieving full window coverage and perfect absorbance in the long-wave infrared band remains a challenge. In order to realize this goal, firstly using impedance matching and equivalent circuits designed a Ti/GaAs/Ti structure. This absorber can achieve a mean absorption of more than 93% in the 8?~?13?μm range. To further improve the absorbance and bandwidth, a stacked metamaterial bi-dielectric perfect absorber based on Ti/GaAs/Ti is then proposed, which has a mean absorbance of up to 96.59% with polarization independence in the 8?~?15?μm band range. It can be seen that the absorption of over 90% (93.8% in TM mode and 91.4% in TE mode) is still maintained as the angle of incidence is increased to 50°. Perfectly absorbed of Broadband is attained through the mixed effect of the coupled PSPR, LSPR, and the intrinsic absorption of the Si<sub>3</sub>N<sub>4</sub>.\n</p></div></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"18 4","pages":"1593 - 1605"},"PeriodicalIF":3.3000,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Broadband Wide-Angle LIWR Perfect Absorber with Double Dielectric Layer\",\"authors\":\"Xiao Lin Wang, Lu Zhu, Yuan Yuan Liu\",\"doi\":\"10.1007/s11468-023-01879-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h2>Abstract\\n</h2><div><p>The wide-bandwidth infrared absorbers of metamaterials have a wide range of applications in thermal emission and imaging. But achieving full window coverage and perfect absorbance in the long-wave infrared band remains a challenge. In order to realize this goal, firstly using impedance matching and equivalent circuits designed a Ti/GaAs/Ti structure. This absorber can achieve a mean absorption of more than 93% in the 8?~?13?μm range. To further improve the absorbance and bandwidth, a stacked metamaterial bi-dielectric perfect absorber based on Ti/GaAs/Ti is then proposed, which has a mean absorbance of up to 96.59% with polarization independence in the 8?~?15?μm band range. It can be seen that the absorption of over 90% (93.8% in TM mode and 91.4% in TE mode) is still maintained as the angle of incidence is increased to 50°. Perfectly absorbed of Broadband is attained through the mixed effect of the coupled PSPR, LSPR, and the intrinsic absorption of the Si<sub>3</sub>N<sub>4</sub>.\\n</p></div></div>\",\"PeriodicalId\":736,\"journal\":{\"name\":\"Plasmonics\",\"volume\":\"18 4\",\"pages\":\"1593 - 1605\"},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2023-05-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Plasmonics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11468-023-01879-w\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasmonics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s11468-023-01879-w","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Broadband Wide-Angle LIWR Perfect Absorber with Double Dielectric Layer
Abstract
The wide-bandwidth infrared absorbers of metamaterials have a wide range of applications in thermal emission and imaging. But achieving full window coverage and perfect absorbance in the long-wave infrared band remains a challenge. In order to realize this goal, firstly using impedance matching and equivalent circuits designed a Ti/GaAs/Ti structure. This absorber can achieve a mean absorption of more than 93% in the 8?~?13?μm range. To further improve the absorbance and bandwidth, a stacked metamaterial bi-dielectric perfect absorber based on Ti/GaAs/Ti is then proposed, which has a mean absorbance of up to 96.59% with polarization independence in the 8?~?15?μm band range. It can be seen that the absorption of over 90% (93.8% in TM mode and 91.4% in TE mode) is still maintained as the angle of incidence is increased to 50°. Perfectly absorbed of Broadband is attained through the mixed effect of the coupled PSPR, LSPR, and the intrinsic absorption of the Si3N4.
期刊介绍：
Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons.
Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.
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