Dual-Zero-Scattering in Diffusive Transport

Area of Science:

• Metamaterials
• Diffusive physics
• Wave phenomena

Background:

• Metamaterial cloaking in diffusive fields is limited by a trade-off between external scattering suppression and internal field distortion.
• Existing metamaterial shells cannot achieve perfect transparency due to inevitable internal field manipulation.

Purpose of the Study:

• To overcome the fundamental trade-off in metamaterial cloaking.
• To achieve true transparency in diffusive fields by eliminating scattering both externally and internally.
• To establish a general paradigm for noninvasive devices in diffusion-based systems.

Main Methods:

• Developed a dual-zero-scattering regime integrating coordinate transformation and scattering cancellation.
• Utilized deep-learning-optimized microstructures to realize anisotropic thermal conductivity.
• Performed numerical simulations and experimental validations.

Main Results:

• Demonstrated simultaneous elimination of scattering in the background medium and metamaterial shell.
• Achieved perfect transparency, overcoming the conventional trade-off.
• Successfully applied the concept to thermal sensors, cloaks, and concentrators.

Conclusions:

• The dual-zero-scattering regime provides a general paradigm for designing truly noninvasive devices.
• This approach has promising extensions to acoustics and electromagnetics.
• Deep-learning-optimized microstructures are key to realizing the required material properties.