TY - JOUR N2 - We report on the absorption properties of polarization-insensitive transmissive and reflective metamaterial absorbers based on two planar aluminium periodic structures and SU-8 epoxy resist. These absorbers were investigated using numerical simulation and experimental methods in the terahertz range (below 2 THz). SU-8 is a very promising organic material for dielectric layers in planar metamaterials, because its application simplifies the process of fabricating these structures and significantly reduces the fabrication time. The experimental absorption of the metamaterial absorbers has narrowband characteristics that were consistent with the numerical simulations. Power flow analysis in the transmissive metamaterial unit cell shows that the absorption in the terahertz range occurs primarily in the SU-8 layer of the absorber. L1 - http://journals.pan.pl/Content/115334/PDF/main.pdf L2 - http://journals.pan.pl/Content/115334 PY - 2018 IS - No 4 EP - 337 KW - Terahertz metamaterial absorber KW - Terahertz spectroscopy KW - Transmittance KW - Reflectance A1 - Grześkiewicz, B. A1 - Sierakowski, A. A1 - Marczewski, J. A1 - Pałka, N. A1 - Wolarz, E. PB - Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology VL - vol. 26 DA - 22.11.2018 T1 - SU-8 based planar metamaterials with fourfold symmetry as selective terahertz absorbers SP - 329 UR - http://journals.pan.pl/dlibra/publication/edition/115334 T2 - Opto-Electronics Review ER -