Electromagnetic energy density in a single-resonance chiral metamaterial

Pi Gang Luan, Yao Ting Wang, Shuang Zhang, Xiang Zhang

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


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)]. This work may provide insights for studying time-dependent phenomena in metamaterials.

Original languageEnglish
Pages (from-to)675-677
Number of pages3
JournalOptics Letters
Issue number5
StatePublished - 1 Mar 2011


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