標題: A Multimetal Broadband Metamaterial Perfect Absorber With Compact Dimension
作者: Zhong, Yan Kai
Fu, Sze Ming
Tu, Ming-Hsiang
Chen, Bo-Ruei
Lin, Albert
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Photonic materials;metamaterials;photonic materials and engineered photonic structures
公開日期: 1-Apr-2016
摘要: We propose an extremely simple multiple-metal metamaterial perfect absorber (MPA). The dimension of our proposed design is only 221 nm for the visible wavelength range from 400 to 700 nm. This is comparable with past efforts on MPAs using plasmonics at the same wavelength range, whereas the plasmonic excitation is absent in our proposal. A unity broadband absorption can be achieved with ultrathin metallic films. In addition, the wavelength scalability is possible using our design, and the fully planar simple configuration facilitates large-area photonic design without the need for lithography and etching. The physics is the field penetration and the field absorption for the photons at different wavelength ranges using different metallic layers. We also show that the adjustment of the individual layer thickness is critical to attaining a perfect wave impedance matching to vacuum. The titanium (Ti), nickel (Ni), and aluminum (Al) triple-metal configuration is used to demonstrate the concept experimentally, and a close match to the theoretical result is observed. The absorption band can be further widened with more stacking layers with various metals. We believe that the proposed design is very promising in the aspects of simple processing and scalable for large-area broadband unity absorption. It thus improves the future implementation of MPAs and facilitates a wide range of relevant applications.
URI: http://dx.doi.org/10.1109/JPHOT.2016.2543003
http://hdl.handle.net/11536/133438
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2016.2543003
期刊: IEEE PHOTONICS JOURNAL
Volume: 8
Issue: 2
起始頁: 0
結束頁: 0
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