English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The power loss and electromagnetic energy density of a metamaterialconsisting of arrays of wires and split-ring resonators (SRRs) areinvestigated. We show that a field energy density formula can be derivedconsistently from both the electrodynamic (ED) approach and the equivalentcircuit (EC) approach. The derivations are based on the knowledge of thedynamical equations of the electric and magnetic dipoles in the medium and thecorrect form of the power loss. We discuss the role of power loss indetermining the form of energy density and explain why the power loss should beidentified first in the ED derivation. When the power loss is negligible andthe field is harmonic, our energy density formula reduces to the result ofLandau's classical formula. For the general case with finite power loss, ourinvestigation resolves the apparent contradiction between the previous resultsderived by the EC and ED approaches.

Power loss and electromagnetic energy density in a dispersive metamaterial medium