A wide-angle polarization-insensitive ultra-thin metamaterial absorber with three resonant modes

In this paper, we report the design, fabrication, and measurement of a metamaterial absorber that is constructed of a periodic array of tetra-arrow resonators (TARs) printed on a dielectric material backed by a metal ground. The TAR absorber can operate at three different resonant modes. By adjusting geometry parameters of the structure, we can obtain a dual-band, polarization-insensitive, wide-angle thin absorber or a single band but ultra-miniature absorber that corresponds to three different resonant modes. Waveguide experiments are conducted to verify the proposed designs effectively. The measurement results show that all three absorptivity peaks come near to perfection.

[1]  Huaiwu Zhang,et al.  Dual band terahertz metamaterial absorber: Design, fabrication, and characterization , 2009 .

[2]  Costas M. Soukoulis,et al.  Wide-angle perfect absorber/thermal emitter in the terahertz regime , 2008, 0807.2479.

[3]  F. Costa,et al.  A Thin Electromagnetic Absorber for Wide Incidence Angles and Both Polarizations , 2008, IEEE Transactions on Antennas and Propagation.

[4]  Jiafu Wang,et al.  A Wide-Band, Polarization-Insensitive and Wide-Angle Terahertz Metamaterial Absorber , 2010 .

[5]  Sailing He,et al.  Omnidirectional, polarization-insensitive and broadband thin absorber in the terahertz regime , 2010 .

[6]  Willie J Padilla,et al.  Design, theory, and measurement of a polarization-insensitive absorber for terahertz imaging , 2008, 0807.3390.

[7]  Tian Jiang,et al.  Polarization Insensitive Metamaterial Absorber with Wide Incident Angle , 2010 .

[8]  Willie J. Padilla,et al.  A dual band terahertz metamaterial absorber , 2010 .

[9]  Willie J Padilla,et al.  Perfect metamaterial absorber. , 2008, Physical review letters.

[10]  Willie J Padilla,et al.  Highly-flexible wide angle of incidence terahertz metamaterial absorber , 2008, 0808.2416.

[11]  Zeyu Zhao,et al.  Realizing near-perfect absorption at visible frequencies. , 2009, Optics express.

[12]  Helin Yang,et al.  Perfect Metamaterial Absorber with Dual Bands , 2010 .

[13]  Willie J Padilla,et al.  Dynamical electric and magnetic metamaterial response at terahertz frequencies , 2006, 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference.