Plasmon response of a metal-semiconductor multilayer 4π-spiral as a negative-index metamaterial
作者： Arash Ahmadivand , Nezih Pala
DOI: 10.1007/S11051-014-2764-9
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摘要: In this study, we investigate the optical response and plasmonic features of a multilayer 4π-spiral composed metal-semiconductor arms, numerically, by employing finite-difference time-domain method. We verified that proposed structure is able to support strong plasmon Fano resonances in circular arms. showed negative polarizability spiral provides an opportunity consider examined as meta-atom. Quantifying effective refractive index for presence various semiconductor substances such Si, GaP, InP, obtained highest possible value associated figure merit (FOM). Ultimately, finite with compositional arrangement Au GaP FOM determined approximately ~62.3.
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