Classical theory of second-harmonic generation from magnetic metamaterials

Details Classical theory of second-harmonic generation from magnetic metamaterials Classical theory of second-harmonic generation from magnetic metamaterials

2008-07-22

arxiv.org/abs/0807.3531v1

Physics

Condensed Matter

Materials Science

5 pages, 3 figures

Scientific paper

Strong second-harmonic generation has recently been experimentally observed from metamaterials consisting of periodic arrays of metal split ring resonators with an effective negative magnetic permeability [Science, 313, 502 (2006)]. To explore the underlying physical mechanism, a classical model derived from microscopic theory is employed here. The quasi-free electrons inside the metal are approximated as a classical Coulomb-interacting electron gas, and their motion under the excitation of an external electromagnetic field is described by the cold-plasma wave equations. Through numerical simulations, it is demonstrated that the microscopic theory includes the dominant physical mechanisms bothqualitatively and quantitatively.

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