Polarization-independent negative-index metamaterial in the near infrared.
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 1400 nm that is independent of the incident polarization. The resonances of the system are comprehensively discussed.
Helgert
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Center for Innovation Competence "ultra optics," Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Jena, Germany. christianhelgert@uni-jena.de
Menzel
C
C
Rockstuhl
C
C
Pshenay-Severin
E
E
Kley
E-B
EB
Chipouline
A
A
Tünnermann
A
A
Lederer
F
F
Pertsch
T
T