Parametrical study of left-handed or right-handed propagation by stacking hole arrays |
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Authors: | M Beruete M Navarro-Cía I Campillo F Falcone I Arnedo M Sorolla |
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Institution: | (1) Millimeter Wave Laboratory, Universidad Pública de Navarra, Campus Arrosadía s/n, 31006 Pamplona, Spain;(2) CIC nanoGUNE Consolider, Paseo Mikeletegi 56, 301, 20009 Donostia, Spain |
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Abstract: | In this paper we analyse the recently reported structure with left-handed (LH) propagation obtained by periodically staking
subwavelength hole arrays working at the extraordinary transmission (ET) resonance. A parametrical study that clarifies in
more detail the equivalent inverse transmission line approach depicted in a previous work is performed. It is seen that ET
is necessary to ensure a strong inductive character of the apertures. Additionally, the metal fraction of the unit cell must
be large enough in order to favour the electric coupling between plates. What is more, the series capacitance is further increased
by setting the plates closer. This allows considering the stacked structure as a metamaterial in that particular dimension.
The experimental transmission results previously published are complemented here with a measurement of the reflection coefficient
in a stack with LH propagation. These results can give rise to interesting applications such as novel lenses and other quasioptical
structures. |
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Keywords: | Extraordinary Optical Transmission Left-handed Propagation Photonic Crystals |
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