A Transparent All-Dielectric Multifunctional Nanoantenna Emitter Compatible With Thermal Infrared and Cooling Scenarios
نویسندگان
چکیده
In modern thermal infrared applications, multi-spectral camouflage scenarios should be developed to mitigate the signature of an object. general, needs satisfied in two main optical ranges: visible, and (IR). IR range, camera modes are deployed detect object: i) short-wave (SWIR) cameras that solar photons reflected off a surface, ii) mid-wave (MWIR) long-wave (LWIR) directly collect blackbody emitted from hot Therefore, ideal scheme acquire function with self-cooling capability, object have: perfect absorption SWIR reflection MWIR LWIR ranges, iii) one-way transmission non-transmissive (NTIR) window (to radiatively cool itself), iv) visible transparency keep background visual appearance intact minimize heat build-up due absorption). this paper, all-dielectric nanoantenna emitter design is comply all above-mentioned requirements. The approach relies on indium tin oxide (ITO) grating structures coated flexible transparent substrate (polystyrene). spectral behaviors proposed structure obtained using both analytical numerical approaches. has peak 0.8 amplitude mode (for backward forward illuminations), while it shows average reflections ≅ 0.7 ranges for illumination. values within NTIR illumination around 0.6 0.9, respectively. Meanwhile, use lossless materials range provides light minimizes absorption. addition, radiated power calculation model utilized demonstrate low detection cameras.
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ژورنال
عنوان ژورنال: IEEE Access
سال: 2021
ISSN: ['2169-3536']
DOI: https://doi.org/10.1109/access.2021.3093704