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Updated: Jun 4, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Electromagnetic energy density in a single-resonance chiral metamaterial
Pi-Gang Luan1, Yao-Ting Wang, Shuang Zhang
1Wave Engineering Laboratory, Department of Optics and Photonics, National Central University, Jhongli, Taiwan. pgluan@dop.ncu.edu.tw
Abstract:
We derive the electromagnetic energy density in a chiral metamaterial consisting of uncoupled single-resonance helical resonators. Both the lossless and absorptive cases are studied, and the energy density is shown to be positively definite. The key relation making the derivation successful is the proportionality between the magnetization and the rate of change of the electric polarization of the medium. The same time-domain formulation of energy density also applies to the bianisotropic medium proposed by Zhang et al. [Phys. Rev. Lett.102, 023901 (2009)PRLTAO0031-900710.1103/PhysRevLett.102.023901]. This work may provide insights for studying time-dependent phenomena in metamaterials.
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