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Related Experiment Video

Updated: Jul 1, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Negative temperature coefficient metamaterial absorber for uniform microwave heating.

Jing Zhou¹, Di Li¹, Lingfeng Xia¹

¹College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

Nature Communications

|June 29, 2026

Summary

Researchers developed a self-regulating metamaterial absorber to solve non-uniform microwave heating. This Negative Temperature Coefficient (NTC) metamaterial absorber adaptively modulates heat distribution for uniform temperature control.

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Area of Science:

Materials Science
Electromagnetics
Thermodynamics

Background:

Microwave heating is prevalent but suffers from non-uniform temperature distribution due to electromagnetic field inhomogeneity.
Existing methods to control energy distribution have not fully resolved the challenge of achieving uniform heating.
Overheating in localized regions is a common issue in microwave applications.

Purpose of the Study:

To introduce a novel self-regulating solution for uniform microwave heating.
To investigate the adaptive modulation of absorbance distribution using a Negative Temperature Coefficient (NTC) Metamaterial Absorber (MA).
To overcome the limitations of conventional electromagnetic field-shaping strategies.

Main Methods:

Development and application of a Negative Temperature Coefficient (NTC) Metamaterial Absorber (MA).
Experimental demonstration across diverse object configurations (planar, polyhedral, curved, multiple objects).
Testing under wide power variations (two orders of magnitude).

Main Results:

Achieved uniform heating with over 90% reduction in the coefficient of variation.
Demonstrated self-regulating capability by suppressing overheating in hot spots and redistributing energy to cooler areas.
Validated effectiveness across various geometries and power levels.

Conclusions:

The NTC Metamaterial Absorber (MA) provides a theoretical and practical resolution to non-uniform microwave heating.
This approach offers intrinsic temperature self-regulation, unlike external field-shaping methods.
Opens new possibilities for temperature-adaptive metamaterials in microwave applications.