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An electromagnetic absorber is realized based on the plasma metamaterial and lumped resistors. For a TE wave, the tunable absorption spectra can be obtained, and the properties of absorption can… Click to show full abstract
An electromagnetic absorber is realized based on the plasma metamaterial and lumped resistors. For a TE wave, the tunable absorption spectra can be obtained, and the properties of absorption can be improved by exciting the different plasma resonance structures. The proposed absorber can work in S, L and C bands, which is covered at 1.6115-4.0798 GHz (absorption rate is larger than 0.9), and its relative bandwidth is 86.7%. However, for a TM wave, the reflection coefficient is near to 1. The proposed electromagnetic absorber not only can realize the ultra-broadband absorption for the TE wave, but also can act as a reflector for the TM wave. A polarization splitter can be realized by such an absorber.
Journal Title: Optical Materials Express
Year Published: 2018
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