Ultra-flexible multiband terahertz metamaterial absorber for conformal geometry applications

Area of Science:

• Materials Science
• Electromagnetics
• Nanotechnology

Background:

• Metamaterial absorbers are engineered structures that can efficiently absorb electromagnetic waves.
• Terahertz (THz) frequency band (0.1-1 THz) applications require specialized absorbers due to unique material properties and propagation characteristics.
• Existing THz absorbers often lack flexibility and multi-band absorption capabilities.

Purpose of the Study:

• To design and fabricate a thin-flexible metamaterial absorber for submillimeter wavelengths (0.1-1 THz).
• To achieve multiple absorption peaks using single-sized meta-cells.
• To evaluate the potential of the absorber for stealth technology applications.

Main Methods:

• Fabrication using standard optical lithography in a cleanroom environment.
• Design utilizing single-sized meta-cells to create multiple absorption peaks.
• Numerical simulations and experimental measurements to validate absorption performance.

Main Results:

• Demonstrated a thin-flexible metamaterial absorber operating in the 0.1-1 THz range.
• Achieved high terahertz absorption, with experimental measurements showing a maximum of approximately 80%.
• Successfully demonstrated multiple absorption peaks through the strategic use of single-sized meta-cells.

Conclusions:

• The developed metamaterial absorber offers efficient, multi-band absorption in the terahertz range.
• The thin-flexible nature and high absorption performance make it suitable for stealth technology.
• This work advances the development of functional metamaterials for advanced electromagnetic applications.