期刊
APPLIED PHYSICS LETTERS
卷 104, 期 22, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4881267
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资金
- National Natural Science Foundation of China [61275030, 61205030, 61235007]
- Qianjiang River Fellow Fund of Zhejiang Province
- Opened Fund of State Key Laboratory of Advanced Optical Communication Systems and Networks
- Fundamental Research Funds for the Central Universities
- Doctoral Fund of Ministry of Education of China [20120101120128]
- Swedish Research Council (VR)
An ultra-narrow band absorber consisting of continuous silver and alumina films is investigated. Owing to Fabry-Perot resonance and silver's inherent loss, an ultra-narrow spectral range of light can be entirely trapped in the structure. By varying thicknesses of metallic and dielectric films, absorption peak shifts in visible and near-infrared regions. When two such metal-insulator-metal stacks are cascaded, experimental results show that an ultra-narrow absorption bandwidth of 7 nm is achieved, though theoretical results give that of 2 nm. Features of high-efficiency and ultra-narrow band absorption have huge potential in optical filtering, thermal emitter design, etc. (C) 2014 AIP Publishing LLC.
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