期刊
OPTICS EXPRESS
卷 20, 期 16, 页码 17503-17508出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.20.017503
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- Instruments Research and Development Establishment (DRDO), Dehradun [47542/S]
- Council for Scientific and Industrial Research, India
Simple designs for polarization independent, metamaterial absorbers at mid-infrared wavelengths and over wide angle of incidence are evaluated computationally. One design consists of an array of circular metallic disks separated from a continuous metallic film by a dielectric film, and shows over 99.9% peak absorbance and a resonant bandwidth of about 0.2 mu m wavelengths. The effects of various geometric parameters are analyzed for this metamaterial. Another design consisting of an array of stacked metal-dielectric-metal disks is shown to have an absorbance of over 90% in a comparatively large band of over 1 mu m bandwidth, although with a lower peak absorbance of 97%. (C) 2012 Optical Society of America
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