Abstract
We present and evaluate theoretically and experimentally a design for a negative-index metamaterial that is termed the “Swiss cross” structure. Compared with the established fishnet structure, the proposed design eliminates the drawback of polarization-dependent effective optical parameters. The new design is fabricated by means of e-beam technology and experimentally analyzed using spectroscopic techniques. The thorough comparison with numerical simulations reveals an effective refractive index of at an operational wavelength of that is independent of the incident polarization. The resonances of the system are comprehensively discussed.
© 2009 Optical Society of America
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