A possibility to use the helical model of molecules for the description of interaction of electromagnetic waves with the artificial chiral media is shown. An analytical model, allowing to calculate electric dipole moment and magnetic moment, induced in the helix under the action of the incident electromagnetic wave, is formed. On the base of present model the evaluation of effective parameter of magneto-electric coupling for single helix is performed. The optimal pitch angle of loops of helix elements of artificial composite media is calculated, which ensures the maximum values of average chirality parameter. It is shown, that optimal pitch angle strongly depends on the number of loops of helix. For example, if the helix consists of a few loops, the optimal pitch angle is close to 2-5 degrees with respect to plane which is perpendicular to axis of helix.
展开▼
