Abstract
We design and analyze a novel multiband left-handed metamaterial based on a
fishnet-like structure at terahertz (THz) frequencies. The metamaterial exhibits
simultaneous negative refractions around the frequencies of 0.48, 1.05, and 1.19 THz
for the electromagnetic (EM) wave normal incidence, and around the frequencies of
0.20, 0.79, and 1.13 THz for parallel incidence. The simulated results verify the
left-handed properties. A particularly important observation is the capability of
the proposed metamaterial with a single geometrical structure to display
multifrequency operations in a unit cell. The compact metamaterial is a major step
toward the miniaturization of THz materials and devices suitable for
multifrequencies.
© 2011 Chinese Optics Letters
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