Abstracts - Dipartimento di Elettronica Applicata
Abstracts - Dipartimento di Elettronica Applicata Abstracts - Dipartimento di Elettronica Applicata
Meta 2010 & FEM 2010 – Rome, 13-15 December 2010 Session MTM-2 Artificial electromagnetic materials: phenomenology and applications Chairperson: V. Galdi, University of Sannio 11:20-11:40 G. Parisi, D. Sammito, M. Natali, S. De Zuani, D. Garoli, and F. Romanato Parametrical analysis of metamaterials fishnet 11:40-12:00 E. Di Gennaro, T. Priya Rose, G. Zito, G. Abbate, and A. Andreone Effect of localized states on photonic quasicrystal waveguides 12:00-12:20 A.G. Chiariello, C. Forestiere, A. Maffucci, and G. Miano Scattering properties of carbon nanotube arrays 12:20-12:40 I. Gallina, G. Castaldi, V. Galdi, A. Alù, and N. Engheta Image formation/displacement and field tunneling in metamaterial transformation slabs 20
Meta 2010 & FEM 2010 – Rome, 13-15 December 2010 Parametrical analysis of metamaterials fish-net Giuseppe Parisi (1,2) , Davide Sammito (2,3) , Marco Natali (4) , Stefano De Zuani (1,2) , Denis Garoli (1,2,3) and Filippo Romanato (1,2,3) (1) University of Padova, Department of Physics Padova, Italy – E-mail: giuseppe.parisi@unipd.it (2) LaNN, Laboratory for Nanofabrication of Nanodevices Padova, Italy (3) IOM-TASC Natl. Lab. CNR-INFM, Trieste, Italy (4) CNR-ICIS, Padova, Italy Recently, the fabrication and optimization of nano-hole arrays in noble metal layers has attracted much attention both because of the interesting new physics associated with them and for their potential applications in nano-optics and biosensing [1,2]. Electric tuneability of the negative refractive index wavelength is theoretically foreseen to be possible by use of dielectrics with electro-optical properties such as PZT. Here we report a design and a parametrical analysis of metamaterial fishnet in the optical spectral range [3]. In particular a dependence analysis on the geometric features of the fishnet is carried out for both the magnetic and the electric resonance. We found out that a sharp negative resonance (electric in nature) is down-shifted to 200 nm by a stronger resonance (magnetic in origin). This split the bandwidth of negative refractive index in two frequency domains. For appropriately designed of squared hole-array structures, the frequency of the magnetic resonance coincides with a region of negative effective permittivity and a negative index of refraction is seen in the simulation. In figure 1 the simulated effective transmittance, reflectance and absorbance of the proposed structure are shown. We also show in figure 2 how the electric and magnetic resonance depend by the squared hole of the fishnet. Fig. 1. Simulated transmittance, reflectance and absorbance. 21 Fig. 2. Simulated dependence of negative refractive index on the hole size References [1] N.C.Lindquist , A. Lesuffleur, and H.Im Oh, Lab Chip, 9 (2009) 382 - 387. [2] J. Ji, G. O'Connel, D.J.D. Carter and D.N. Larson, . Anal. Chem., 80 (2008) 2491-2498 [3] J. Valentine, S. Zhang, T.Zentgraf, E. Ulin-Avilal, D.A. Genov, G. Bartal, X. and Zhang, Nature 455 (2008) 367-379.
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Meta 2010 & FEM 2010 – Rome, 13-15 December 2010<br />
Session MTM-2<br />
Artificial electromagnetic materials: phenomenology and<br />
applications<br />
Chairperson: V. Gal<strong>di</strong>, University of Sannio<br />
11:20-11:40<br />
G. Parisi, D. Sammito, M. Natali, S. De Zuani, D. Garoli, and F. Romanato<br />
Parametrical analysis of metamaterials fishnet<br />
11:40-12:00<br />
E. Di Gennaro, T. Priya Rose, G. Zito, G. Abbate, and A. Andreone<br />
Effect of localized states on photonic quasicrystal waveguides<br />
12:00-12:20<br />
A.G. Chiariello, C. Forestiere, A. Maffucci, and G. Miano<br />
Scattering properties of carbon nanotube arrays<br />
12:20-12:40<br />
I. Gallina, G. Castal<strong>di</strong>, V. Gal<strong>di</strong>, A. Alù, and N. Engheta<br />
Image formation/<strong>di</strong>splacement and field tunneling in metamaterial<br />
transformation slabs<br />
20
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