Journal
MATERIALS LETTERS
Volume 192, Issue -, Pages 21-24Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.01.067
Keywords
Metamaterial; Absorber; Broadband; Ultra-thin; Sensor
Funding
- National Natural Science Foundation of China [61275070]
- Shanghai Natural Science Foundation [15ZR1415900]
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In this paper, we proposed a broadband, ultrathin and polarization-insensitive metamatetial absorber which consists of three layers in the infrared and Optical regions. Compared with the traditional three layers absorber, the most remarkable difference is that the metal Sn and InSb are used on the top layer at the same time. Numerical results reveal that a broadband absorption spectrum more than 90% can be achieved from the 97.0 THz to 115 THz. In addition, the perfect absorption character (484.4 THz-603.6 THz) also can be applied in the optical region by adjusting the structure parameters. The impedance matching theory and surface current distributions are investigated to explain the physical mechanism of the perfect absorption performance. (C) 2017 Elsevier B.V. All rights reserved.
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