Journal
OPTICS EXPRESS
Volume 20, Issue 14, Pages 14871-14878Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.014871
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Funding
- National Science Foundation of China [10974183, 11104252]
- Ministry of Education of China [20114101110003]
- Aeronautical Science Foundation of China [2011ZF55015]
- Basic and Frontier Technology Research Program of Henan Province [112300410264]
- fund for Science & Technology innovation team of Zhengzhou [2011-03]
- cooperation fund with Fudan University [KL2011_01]
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A broad-band perfect absorber composing a two-dimensional periodic metal-dielectric-metal sandwiches array on dielectric/metal substrate is designed and numerically investigated. It is shown that the nearly-perfect absorption with a bandwidth of about 50 nm in visible region can be achieved by overlapping of two plasmon resonances: one originating from the coupling of electric dipoles between adjacent unit cells and another arising from magnetic dipole plasmon resonances. A capacitor-inductor circuit description is introduced to explain the dependence of resonance frequencies and band-width on geometrical parameters. (c) 2012 Optical Society of America
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