Journal
OPTICS EXPRESS
Volume 23, Issue 16, Pages 21023-21031Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.021023
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Funding
- National Natural Science Foundation of China [51421063, 51306043, 11474077, 11404083]
- China Postdoctoral Science Foundation [2014T70331, 2014M560258]
- Program for Innovation Research of Science in Harbin Institute of Technology [A201411, B201407]
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We propose a wide-angle, polarization independent and fabrication-tolerant perfect absorber, which is based on a one-dimensional stacked array consisted of vertically cascaded two pairs of metal-dielectric bilayers. The results show that the absorption peaks are over 99% at the wavelength of 5.25 mu m for different polarization angles, and remain very high within wide ranges of incident and azimuthal angles. We attribute those excellent performances to the excitation of the magnetic resonance (MR) and the guided mode resonance (GMR) for the TM and TE polarization, respectively, and are further expounded by the inductor-capacitor (LC) circuit model and the eigen equation of the GMR, respectively. More importantly, this one-dimensional absorber is very robust to the spacing distance between the neighboring stacks and the metallic strip thickness, which releases degrees of freedom in design and makes the absorber extremely flexible and simple in fabrication, thus it can be a good candidate for many fascinating applications. (C) 2015 Optical Society of America
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