Design of Split Hexagonal Patch Array Shaped Nano-metaabsorber with Ultra-wideband Absorption for Visible and UV...

Area of Science:

• Metamaterials
• Nanophotonics
• Renewable Energy

Background:

• Solar energy harvesting requires efficient light absorption across a broad spectrum.
• Existing solar cell absorbers often suffer from narrow-angle tolerance and polarization sensitivity.
• There is a need for broadband, polarization-insensitive absorbers for effective solar energy conversion.

Purpose of the Study:

• To propose and analyze a novel Split Hexagonal Patch Array (SHPA) metamaterial absorber.
• To achieve broadband absorption with minimal polarization sensitivity for solar energy harvesting.
• To demonstrate the Double-negative (DNG) characteristics of the proposed metamaterial absorber.

Main Methods:

• Design of a Split Hexagonal Patch Array (SHPA) metamaterial with six nano-arms and a vertical split.
• Utilizing electromagnetic resonance steering to achieve negative permittivity and permeability (DNG property).
• Analysis based on the photoconversion quantum method for photon absorption efficiency and numerical simulations.

Main Results:

• The SHPA metamaterial absorber exhibits Double-negative (DNG) characteristics.
• Simulations show over 95% absorption capacity in the visible and ultraviolet (UV) spectrum.
• The structure demonstrates polarization insensitivity and wide incident angle absorption capabilities.

Conclusions:

• The proposed SHPA metamaterial absorber is effective for broadband solar spectrum energy harvesting.
• The DNG property and symmetric design contribute to enhanced absorption and low polarization sensitivity.
• The SHPA structure shows potential for terahertz (THz) regime energy harvesting in solar cells and photonic applications.