We numerically study the negative index properties of sandwiched metamaterials, perforated with a square array of circle holes filled with different media. Transmission spectra indicate that the filling medium can effectively change the position of the localized resonant peak, while keeping the position of the other transmission peaks hardly changed. Reflection spectra and retrieved effective impedance verify that an appropriate choice of the filling medium can provide a perfect impedance match. Due to the perfect impedance match, the electromagnetic responses of the negative index band based on the internal surface plasmon polaritons change in many aspects, such as a stronger magnetic resonance, a higher figure of merit and a narrower negative refractive index band.
We numerically study the negative index properties of sandwiched metamaterials, perforated with a square array of circle holes filled with different media. Transmission spectra indicate that the filling medium can effectively change the position of the localized resonant peak, while keeping the position of the other transmission peaks hardly changed. Reflection spectra and retrieved effective impedance verify that an appropriate choice of the filling medium can provide a perfect impedance match. Due to the perfect impedance match, the electromagnetic responses of the negative index band based on the internal surface plasmon polaritons change in many aspects, such as a stronger magnetic resonance, a higher figure of merit and a narrower negative refractive index band.
(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
引用本文:
WANG Xu-Dong;YE Yong-Hong;MA Ji;JIANG Mei-Ping. Influence of Filling Medium of Holes on the Negative-Index Response of Sandwiched Metamaterials[J]. 中国物理快报, 2010, 27(9): 94101-094101.
WANG Xu-Dong, YE Yong-Hong, MA Ji, JIANG Mei-Ping. Influence of Filling Medium of Holes on the Negative-Index Response of Sandwiched Metamaterials. Chin. Phys. Lett., 2010, 27(9): 94101-094101.
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