Related Experiment Video
Updated: Dec 26, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Polar Metamaterials: A New Outlook on Resonance for Cloaking Applications
H Nassar1, Y Y Chen1, G L Huang1
1Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri 65211, USA.
Abstract:
Rotationally resonant metamaterials are leveraged to answer a longstanding question regarding the existence of transformation-invariant elastic materials and the ad hoc possibility of transformation-based passive cloaking in full plane elastodynamics. Combined with tailored lattice geometries, rotational resonance is found to induce a polar and chiral behavior, that is, a behavior lacking stress and mirror symmetries, respectively. The central, and simple, idea is that a population of rotating resonators can exert a density of body torques strong enough to modify the balance of angular momentum on which hang these symmetries. The obtained polar metamaterials are used as building blocks of a cloaking device. Numerical tests show satisfactory cloaking performance under pressure and shear probing waves, further coupled through a free boundary. The work sheds new light on the phenomenon of resonance in metamaterials and should help put transformation elastodynamics on equal footing with transformation acoustics and optics.
Related Concept Videos
Parallel Resonance
Standing Waves in a Cavity
Potential Due to a Polarized Object
Characteristics of Series Resonant Circuit
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
Mesh Analysis for AC Circuits
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...

