Journal
OPTICS EXPRESS
Volume 23, Issue 3, Pages 3523-3533Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.003523
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Funding
- National Natural Science Foundation of China [61271100, 61471389]
- Natural Science Foundational Research Fund of Shaanxi Province [2010JZ6010, 2012JM8003]
- Doctoral Foundation at Air Force Engineering University [KGD080914002]
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We demonstrate a polarization-insensitive perfect absorber with multiband and broadband absorption based on a tunable and thin metamaterial, which consists of a double split-ring microstructure (DSRM) on double-layer and a coating substrate. The multiband absorption at different frequencies and broadband absorption with the relative bandwidth of 90.63% from 5.69GHz to 15.12GHz, of which the absorptivity is larger than 90%, can be achieved by changing the rotary angle of the proposed DSRM perfect metamaterial absorber (DSRM-PMA). The advantages of polarized-insensitivity, wide bandwidth and multiband absorption are illuminated by the angular absorptions and the surface current distributions. The DSRM-PMA device with similar geometry in simulation is fabricated and tested to clearly validate the functionality of our design. The simulated and experimental results indicate that the DSRM-PMA performs multiband and broadband absorptions with the rotary angle of 0 degrees and 90 degrees respectively. (C) 2015 Optical Society of America
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