Journal
OPTICS EXPRESS
Volume 20, Issue 25, Pages 27756-27765Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.027756
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Funding
- A*STAR Metamaterials program [0921540097, 0921540099]
- [NRF-G-CRP 2007-01]
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We present a planar waveguide model and a mechanism based on standing wave resonances to interpret the unity absorptions of ultrathin planar metamaterial absorbers. The analytical model predicts that the available absorption peaks of the absorber are corresponding to the fundamental mode and only its odd harmonic modes of the standing wave. The model is in good agreement with numerical simulation and can explain the main features observed in typical ultrathin planar metamaterial absorbers. Based on this model, ultrathin planar metamaterial absorbers with multi-band absorptions at desired frequencies can be easily designed. (C)2012 Optical Society of America
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