Shape-dependent absorption characteristics of three-layered metamaterial absorbers at near-infrared
- 1 April 2011
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 109 (7), 074510
- https://doi.org/10.1063/1.3573495
Abstract
We experimentally demonstrate the absorption properties of designed metamaterial absorbers in the near-infrared wavelength regime. For the rectangular-shaped case, we demonstrate its polarization dependent absorbance at various incident angles. For each polarization, the absorbance is insensitive to the incident angle (up to 60°) and a maximum absorbance of 0.95 is obtained. Of particular interest we experimentally observe an absorption peak corresponding to a high-order resonance at 60° with an absorbance of 0.68 excited by the TM polarization. For the square-shaped case, we show its polarization-independent absorption property. A maximum absorbance around 0.65 is achieved at normal incidence and it remains high for incidence angles up to 50°.Keywords
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