Design of a broadband metamaterial absorber for visible solar radiation entrapment

Rahman, Sydur; Islam, Md. Asiful; Alam, M. Shah

doi:10.1109/ictp53732.2021.9744206

Cited by 3 publications

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Strong and Broadband Visible Absorption Based on Titanium Patterned Resonator

Sayed,

Mahmoud,

Mubarak

2023

Plasmonics

View full text Add to dashboard Cite

The visible band is characterized by a high concentration of solar energy, making it highly desirable to achieve perfect absorption within this spectral range. This paper presents a novel design of a broadband metamaterial absorber (BMA) based on titanium (Ti), which exhibits a superior level of high absorption in the visible regime. The absorber is composed of three layers arranged from top to bottom: a newly shaped Ti top layer resonator, a SiO2 dielectric spacer, and a Ti bottom reflector. With a thickness of 195 nm, the BMA structure demonstrates an average absorption of 98.11% across the wavelength range of 400–800 nm, ensuring absorption levels greater than 90% through the entire visible band. The influence of different geometrical parameters and structures on absorption was studied, and the physical mechanism behind the high absorption was explored. Additionally, the proposed structure offers the benefit of maintaining 90% absorption stability for large incident angles up to 60° for TE and up to 70° for TM mode oblique incidence. Therefore, our proposed absorber emerges as an optimal candidate for a variety of solar energy harvesting applications.

show abstract

Strong and Broadband Visible Absorption Based on Titanium Patterned Resonator

Sayed,

Mahmoud,

Mubarak

2023

Plasmonics

View full text Add to dashboard Cite

show abstract

Design and optimization of broadband metamaterial absorber based on manganese for visible applications

Sayed

Mahmoud

Mubarak

2023

Sci Rep

View full text Add to dashboard Cite

Metamaterial absorbers have been extensively researched due to their potential applications in photonics. This paper presents a highly efficient Broadband Metamaterial Absorber (BMA) based on a Manganese–Silica–Manganese three layer structure with a shaped pattern at the top layer. For maximum absorption efficiency, the geometrical parameters of the proposed absorber have been optimized based on Particle Swarm Optimization (PSO). The optimal structure with a thickness of 190 nm, can achieve more than 94% absorption spanning visible band (400–800) nm with 98.72% average absorption, and more than 90% absorption over the range from 365 to 888 nm. In the range from 447 to 717 nm, the design presented above 99% absorptivity, providing an ultra-wide bandwidth of 270 nm. The physical mechanism of absorption is illustrated through the exploration of the electric and magnetic field distributions. Additionally, the proposed structure maintains 85% absorption stability for wide incident angles up to 70° for both the TE and TM polarizations under oblique incidence. Further, the optimized absorber structure with excellent absorption capabilities makes it suitable for various applications, including optical sensors, thermal emitters, and color imaging applications.

show abstract