Abstract
A novel metamaterial with double-helical wire structures was proposed to
construct optical circular polarizers which have boarder wavelength bands
than those with single-helical structures. In this work, we systematically
studied the dependence of optical properties of the double- and
single-helical circular polarizers on their length of helix-period, spacing
of grid, number of helix-period, diameter of helix, and diameter of wire.
The simulation results show that the double-helical circular polarizers have
much broader operation bands than the single-helical ones but have
considerably lower extinction ratios for all structural parameters. In
addition, the influences of the structural parameters on the optical
performances are quite distinct between the single- and double-helical
structures. This paper summarized the main influences, which is of certain
directive significance to related experimental studies.
© 2010 IEEE
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