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An Ultra-Thin Near-Perfect Absorber via Block Copolymer Engineered Metasurfaces

被引：7
|
作者：
Cummins, Cian [1 ,2 ]
Flamant, Quentin [1 ]
Dwivedi, Ranjeet [1 ]
Alvarez-Fernandez, Alberto [3 ]
Demazy, Nils [2 ]
Bentaleb, Ahmed [1 ]
Pound-Lana, Gwenaelle [4 ]
Zelsmann, Marc [4 ]
Barois, Philippe [1 ]
Hadziioannou, Georges [2 ]
Baron, Alexandre [1 ]
Fleury, Guillaume [2 ]
Ponsinet, Virginie [1 ]
机构：
[1] Univ Bordeaux, Ctr Rech Paul Pascal, CNRS UMR 5031, 115 Ave Schweitzer, F-33600 Pessac, France
[2] Univ Bordeaux, LCPO, Bordeaux INP, CNRS,UMR 5629, F-33600 Pessac, France
[3] UCL, Dept Chem Engn, Torrington Pl, London WC1E 7JE, England
[4] Univ Grenoble Alpes, LTM, Grenoble INP, CNRS,CEA,LETI Minatec, F-38000 Grenoble, France
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 609卷
关键词：
Block copolymers; Metasurfaces; Perfect absorbers; Nanoresonators; Flat optics; ARRAYS;
D O I：
10.1016/j.jcis.2021.11.163
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Producing ultrathin light absorber layers is attractive towards the integration of lightweight planar components in electronic, photonic, and sensor devices. In this work, we report the experimental demonstration of a thin gold (Au) metallic metasurface with near-perfect visible absorption (similar to 95 %). Au nanoresonators possessing heights from 5 - 15 nm with sub-50 nm diameters were engineered by block copolymer (BCP) templating. The Au nanoresonators were fabricated on an alumina (Al2O3) spacer layer and a reflecting Au mirror, in a film-coupled nanoparticle design. The BCP nanopatterning strategy to produce desired heights of Au nanoresonators was tailored to achieve near-perfect absorption at approximate to 600 nm. The experimental insight described in this work is a step forward towards realizing large area flat optics applications derived from subwavelength-thin metasurfaces. (C) 2021 Elsevier Inc. All rights reserved.
引用
收藏
页码：375 / 383
页数：9
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