Design of a wideband metamaterial absorber for optical wavelength applications based on Hadamard matrix
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2021-12-30
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It can be a complex and daunting task to achieve broadband absorption, in this work we demonstrate a polarization insensitive ultrathin metamaterial (MM) absorber based on the Hadamard-matrix. Within the optical domain, the demonstrated MM absorber showcases absorption of over 91% for both transverse electric (TE) mode and transverse magnetic (TM) mode. To explore the angular dependence on absorption features of our Hadamard-matrix metaabsorber (HMMA), both TE and TM modes are used at numerous incident-angles. Finite integration technique was utilized to simulate the demonstrated MM absorber design and validated using the interference theory model to assure the simulated data. Moreover, electric and magnetic field characteristics, current distributions, and a plethora of parametric sweeps were also investigated in order to better understand the suggested HMMA absorption mechanism. Because of its wideband absorption and polarization insensitive characteristic, this MM absorber based on the Hadamard-matrix arrangement permits a variety of applications such as light detectors, opticalsensors, magnetic resonance imaging, plasmonic-sensors, and thermal imaging applications.
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Electrical and Computer Engineering
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North South University