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Meta 2010 & FEM 2010 – Rome, 13-15 December 2010 Image Formation/Displacement and Field Tunneling in Metamaterial Transformation Slabs Ilaria Gallina (1) , Giuseppe Castaldi (1) , Vincenzo Galdi (1) , Andrea Alù (2) , and Nader Engheta (3) (1) University of Sannio, Department of Engineering Benevento, Italy – E-mail: ilaria.gallina@unisannio.it, castaldi@unisannio.it, vgaldi@unisannio.it (2) The University of Texas at Austin, Department of Electrical and Computer Engineering, Austin, TX 78712, USA – E-mail: alu@mail.utexas.edu (3) University of Pennsylvania, Department of Electrical and Systems Engineering, Philadelphia, PA 19104, USA – E-mail: engheta@ee.upenn.edu Transformation optics has recently emerged as one of the most interesting and promising approaches to the synthesis of metamaterials for electromagneticfield manipulation (see, e.g., [1]). In this work, we review and summarize some recent results [2,3] on the electromagnetic properties of certain general classes of metamaterial slabs, inspired by transformation optics, that exploit their intrinsic anisotropy and inhomogeneity to achieve exotic material properties, within double-positive, double-negative or single-negative constitutive parameters. In particular, by means of analytical and numerical full-wave studies, we derive some conditions for total transmission, which generalize some previous results in the literature, and explore the image displacement/formation properties, of interest for applications such as anti-reflection radomes, anti-cloaking, and lensing/focusing. Our results confirm the broad breadth of transformation optics and its intriguing potentials as a general unifying approach to the design of application-oriented metamaterials. In particular, we systematically derive the conditions for designs that do not require negative constitutive parameters, but that exploit the inherent anisotropy of the transformation slabs to achieve the required field-manipulation effects within the double-positive (possibly nonmagnetic) regime of operation. References [1] J. B. Pendry, D. Schurig, and D. R. Smith, “Controlling electromagnetic fields,” Science, 312, 1780-1782, 2006 [2] I. Gallina, G. Castaldi, V. Galdi, A. Alù, and N. Engheta, “General class of metamaterial transformation slabs,” Phys. Rev. B, 81, 125124, 2010 [3] G. Castaldi, I. Gallina, V. Galdi, A. Alù, and N. Engheta, “Transformation-optics generalization of tunnelling effects in bi-layers made of paired pseudo-epsilonnegative/mu-negative media,” to be published in J. Opt. (Special Issue on Transformation Optics), 2011 24
Session FEM-1 Magnetic device modeling Meta 2010 & FEM 2010 – Rome, 13-15 December 2010 Chairperson: A. Salvini, “Roma Tre” University 14:00-14:40 Invited paper – N. Takahashi Application of ON/OFF method to new conceptual design of magnetic devices 14:40-15:00 C. Ragusa, B. Montrucchio, V. Giovara, F. Khan, O. Khan, M. Repetto, and B. Xie Implementation of a 3D micromagnetic code on a parallel and distributed architecture 15:00-15:20 S. Coco, A. Laudani, F. Riganti Fulginei, A. Salvini Neural-FEM approach for the analysis of hysteretic materials in unbounded domain 25
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