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      Polarization insensitive phase change material-based nanoantenna array for thermally tunable infrared applications

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      Author(s)
      Khalichi, Bahram
      Omam, Zahra Rahimian
      Osgouei, Ataollah Kalantari
      Ghobadi, Amir
      Özbay, Ekmel
      Date
      2022-09-21
      Source Title
      Antennas and Propagation Society International Symposium
      Publisher
      Institute of Electrical and Electronics Engineers
      Pages
      687 - 688
      Language
      English
      Type
      Conference Paper
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      Abstract
      Thermal radiation management is an emerging application of metamaterials owing to their exotic electromagnetic radiative properties. Herein, a thermally tunable phase change material-based nanoantenna array is reported to manipulate electromagnetic waves for potential applications in radiative cooling and multispectral camouflage from thermal infrared detectors. The simulation results show that the proposed nanoantenna array possesses high reflectance exceeding at least 60% within the 3−5 µm and 8−12 µm wavelength ranges, indicating low thermal emissivity, while the reflectance value increases as the temperature rises. Additionally, the wavelength-selective nanoantenna emitter operates with high absorption and therefore emission within the non-atmospheric window (5−8 µm). The thermally tuning feature leads to further controlling the absorption and, therefore, the emission performance of the nanoantenna and corresponding infrared signatures detected by thermal cameras.
      Keywords
      Nanoantenna array
      Phase change material
      Thermal tunability
      Polarization insensitivity
      Permalink
      http://hdl.handle.net/11693/111960
      Published Version (Please cite this version)
      https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886423
      Collections
      • Department of Electrical and Electronics Engineering 4011
      • Department of Physics 2550
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
      • Nanotechnology Research Center (NANOTAM) 1179
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