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 n=1.9 at an operational wavelength of 1400nm that is independent of the incident polarization. The resonances of the system are comprehensively discussed.

© 2009 Optical Society of America

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