A Simple Design of a Multi-Band Terahertz Metamaterial Absorber Based on Periodic Square Metallic Layer with T-Shaped Gap

We present a multi-band terahertz absorber formed by periodic square metallic ribbon with T-shaped gap and a metallic ground plane separated by a dielectric layer. It is demonstrated that absorption spectra of the proposed structure consist of four absorption peaks located at 1.12, 2.49, 3.45, and 3.91 THz with high absorption coefficients of 98.0, 98.9, 98.7, and 99.6%, respectively. It is demonstrated that the proposed absorber has the tunability from single-band to broadband by changing the length of square metallic ribbon and we can also select or tune the frequencies which we want to use by changing polarization angles. Importantly, the quality factor Q at 3.91 THz is 30.1, which is 5.6 times higher than that of 1.12 THz. These results indicate that the proposed absorber has a promising potential for devices, such as detection, sensing, and imaging.

[1]  P. Van Dorpe,et al.  Improvement of Figure of Merit for Gold Nanobar Array Plasmonic Sensors , 2011 .

[2]  Tie Jun Cui,et al.  Triple-band terahertz metamaterial absorber: Design, experiment, and physical interpretation , 2012 .

[3]  U. Leonhardt.  Optical Conformal Mapping , 2006, Science.

[4]  C. Sabah,et al.  Multiband Metamaterial Absorber Design Based on Plasmonic Resonances for Solar Energy Harvesting , 2016, Plasmonics.

[5]  David R. Smith,et al.  Terahertz compressive imaging with metamaterial spatial light modulators , 2014, Nature Photonics.

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

[7]  Willie J Padilla,et al.  Taming the blackbody with infrared metamaterials as selective thermal emitters. , 2011, Physical review letters.

[8]  J. Pendry,et al.  Three-Dimensional Invisibility Cloak at Optical Wavelengths , 2010, Science.

[9]  D. Cumming,et al.  A terahertz polarization insensitive dual band metamaterial absorber. , 2011, Optics letters.

[10]  T. Cui,et al.  Polarization-independent wide-angle triple-band metamaterial absorber. , 2011, Optics express.

[11]  Ben-Xin Wang,et al.  A simple design of ultra-broadband and polarization insensitive terahertz metamaterial absorber , 2014 .

[12]  D. R. Chowdhury,et al.  Impact of resonator geometry and its coupling with ground plane on ultrathin metamaterial perfect absorbers , 2012, 1207.0540.

[13]  D P Tsai,et al.  Towards the lasing spaser: controlling metamaterial optical response with semiconductor quantum dots. , 2009, Optics express.

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

[15]  David R. Smith,et al.  Broadband Ground-Plane Cloak , 2009, Science.

[16]  Houtong Chen.  Interference theory of metamaterial perfect absorbers. , 2011, Optics Express.

[17]  Liang-yao Chen,et al.  Multi-band metamaterial absorber based on the arrangement of donut-type resonators. , 2013, Optics express.

[18]  Peter Uhd Jepsen,et al.  Metamaterial composite bandpass filter with an ultra-broadband rejection bandwidth of up to 240 terahertz , 2014 .

[19]  Ben-Xin Wang.  Single-Patterned Metamaterial Structure Enabling Multi-band Perfect Absorption , 2017, Plasmonics.

[20]  Harald Giessen,et al.  Plasmonic Building Blocks for Magnetic Molecules in Three‐Dimensional Optical Metamaterials , 2008 .

[21]  Pramod K. Singh,et al.  Single and dual band 77/95/110 GHz metamaterial absorbers on flexible polyimide substrate , 2011 .

[22]  J. Hao,et al.  Nearly total absorption of light and heat generation by plasmonic metamaterials , 2011 .

[23]  D. Werner,et al.  A genetic algorithm approach to the design of ultra‐thin electromagnetic bandgap absorbers , 2003 .

[24]  Junpeng Guo,et al.  Multispectral near-perfect metamaterial absorbers using spatially multiplexed plasmon resonance metal square structures , 2013 .

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

[26]  M. Hentschel,et al.  Infrared perfect absorber and its application as plasmonic sensor. , 2010, Nano letters.

[27]  Jack Ng,et al.  Metamaterial frequency-selective superabsorber. , 2009, Optics letters.

[28]  Lei Zhang,et al.  Negative Index Materials Using Simple Short Wire Pairs , 2006 .

[29]  D. Xiao,et al.  Ultrabroadband Mid-infrared Light Absorption Based on a Multi-cavity Plasmonic Metamaterial Array , 2016, Plasmonics.

[30]  Willie J Padilla,et al.  Infrared spatial and frequency selective metamaterial with near-unity absorbance. , 2010, Physical review letters.

[31]  David R. Smith,et al.  Metamaterials and Negative Refractive Index , 2004, Science.

[32]  Thomas Koschny,et al.  An efficient way to reduce losses of left-handed metamaterials. , 2008, Optics express.

[33]  J. Pendry,et al.  Negative refraction makes a perfect lens , 2000, Physical review letters.

[34]  Ata Khalid,et al.  Polarization insensitive, broadband terahertz metamaterial absorber. , 2011, Optics letters.

[35]  Harald Giessen,et al.  Plasmon Hybridization in Stacked Cut‐Wire Metamaterials , 2007 .

[36]  David R. Smith,et al.  Terahertz plasmonic high pass filter , 2003 .

[37]  Nikolay I. Zheludev,et al.  Ultrafast all-optical switching via coherent modulation of metamaterial absorption , 2014 .

[38]  N. Fang,et al.  Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab. , 2011, Nano letters.