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Limited By:	Author = Bilal, R.M.H.;

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Displaying Results 1 - 3 of 3 on page 1 of 1

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Elliptical metallic rings‑shaped fractal metamaterial absorber in the visible regime (2020)

Bilal, R.M.H.; Saeed, M. A.; Choudhury, P. K.; Baqir, M. A.; Kamal, W.; Ali, Muhammad M...

Elliptical metallic rings‑shaped fractal metamaterial absorber in the visible regime (2020)

Bilal, R.M.H.; Saeed, M. A.; Choudhury, P. K.; Baqir, M. A.; Kamal, W.; Ali, Muhammad Mahmood; Rahim, Arbab Abdur

Abstract:

Achieving the broadband response of metamaterial absorbers has been quite challenging due to the inherent bandwidth limitations. Herein, the investigation was made of a unique kind of visible light metamaterial absorber comprising elliptical rings‑shaped fractal metasurface using tungsten metal. It was found that the proposed absorber exhibits average absorption of over 90% in the visible wavelength span of 400–750 nm. The features of perfect absorption could be observed because of the localized surface plasmon resonance that causes impedance matching. Moreover, in the context of optoelectronic applications, the absorber yields absorbance up to ~ 70% even with the incidence obliquity in the range of 0°–60° for transverse electric polarization. The theory of multiple reflections was employed to further verify the performance of the absorber. the obtained theoretical results were found to be in close agreement with the simulation results. in order to optimize the results, the pe...

http://hdl.handle.net/10344/9171

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Polarization-insensitive multi-band metamaterial absorber operating in the 5G spectrum (2020)

Bilal, R.M.H.; Baqir, M.A.; Choudhury, Pankaj Kumar; Ali, Muhammad Mahmood; Rahim, Arba...

Polarization-insensitive multi-band metamaterial absorber operating in the 5G spectrum (2020)

Bilal, R.M.H.; Baqir, M.A.; Choudhury, Pankaj Kumar; Ali, Muhammad Mahmood; Rahim, Arbab Abdur; Kamal, W.

Abstract:

The full text of this article will not be available in ULIR until the embargo expires on the 20/05/2022
A polarization-insensitive multi-band metamaterial absorber comprised of four concentric rectangular rib structures, mounted over a dielectric medium, was investigated. The performance of the absorber was studied under different polarization and oblique incidence angles. Both the transverse electric (TE) and transverse magnetic (TM) incidence radiations were exploited to investigate the absorption characteristics. It was found that the four-fold symmetry in the configuration makes the absorber to remain insensitive under the influence of such operational conditions. The proposed structure yields four independent high absorption peaks within the 5G spectral range. The absorptivity of the structure was also investigated for various values of the thickness of dielectric substrate on which the metasurface was constructed. The electric field and surface current distribution pattern...

http://hdl.handle.net/10344/9030

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Tunable and multiple plasmon-induced transparency in a metasurface comprised of silver s-shaped resonator and rectangular strip (2020)

Bilal, R.M.H.; Baqir, Muhammad Abuzar; Choudhury, Pankaj Kumar; Ali, Muhammad Mahmood; ...

Tunable and multiple plasmon-induced transparency in a metasurface comprised of silver s-shaped resonator and rectangular strip (2020)

Bilal, R.M.H.; Baqir, Muhammad Abuzar; Choudhury, Pankaj Kumar; Ali, Muhammad Mahmood; Rahim, Arbab Abdur

Abstract:

The plasmon-induced transparency (PIT) in planar metasurface comprising of resonators having one S-shaped structure and a rectangular strip (both made of silver) was investigated. It was found that the S-shaped component of metasurface induces a single bright mode, whereas the rectangular strip manifests two bright modes with strong coupling of incident electromagnetic waves. When both the metasurface components were placed in the proximity, the PIT-like phenomenon was observed. The effects of rotational angle of the metasurface as well as the angle of incidence on the transmission spectra (of the metasurface) were also investigated. Both the transverse electric (TE) and transverse magnetic (TM) waves were used to explore the PIT effect. It was noticed that the PIT window could be easily tuned by altering the horizontal distance between the resonator components (i.e., the S-shaped structure and rectangular strip). It is expected that the proposed metasurface structure would be prude...

http://hdl.handle.net/10344/8766

Displaying Results 1 - 3 of 3 on page 1 of 1

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