Abstracts - Dipartimento di Elettronica Applicata
Abstracts - Dipartimento di Elettronica Applicata Abstracts - Dipartimento di Elettronica Applicata
Meta 2010 & FEM 2010 – Rome, 13-15 December 2010 Controlling Optical Forces on Nanoparticles through Metamaterials Simone Tricarico, Filiberto Bilotti and Lucio Vegni University “Roma Tre”, Department of Applied Electronics Rome, Italy – E-mail: stricarico@uniroma3.it In this contribution, we propose a theoretical analysis showing how metamaterials conformal covers surrounding a given nanoscatterer may be effectively used not only to design cloaking devices [1,2], but also to synthesize shells able to control acting optical forces [3]. Here, we extend the scattering cancellation approach in order to derive the proper conditions under which plasmonic media or metamaterials can be used to manipulate optical forces exerted by the illuminating radiation on a Rayleigh particle. In the long wavelength limit, in fact, such kind of forces are directly related to the amplitude of the object electric polarizability. Since scattering cancellation technique relies in suppressing the scattered field by nullifying the polarizability of the overall object, we may exploit the inherently dispersive behavior metamaterials to design a suitable cover able to govern optical forces (see Figure 1). x �0 y �0 2 E0 f) b) Figure 1 – a) Gradient force field distribution for a bare dielectric spherical particle placed in the interference region of two orthogonal standing waves with zero phase shift. b) Gradient force field distribution in the same configuration for a dielectric spherical covered by a metamaterial shell. At the working frequency (zero crossing of the electric polarizability) the gradient force is minimized. References [1] A. Alù and N. Engheta, “Achieving transparency with plasmonic and metamaterial coatings,” Phys. Rev. E, 72, 016623, 2005 [2] S. Tricarico, F. Bilotti, and L. Vegni, “Reduction of optical forces exerted on nanoparticles covered by scattering cancellation based plasmonic cloaks,” Phys. Rev. B, 82, 045109, 2010 [2] S. Tricarico, F. Bilotti, A. Alù, and L. Vegni, “Plasmonic Cloaking for Irregular Objects with Anisotropic Scattering Properties,” Phys. Rev. E, 81, 026602, 2010 60 x �0 y �0 2 E0
Meta 2010 & FEM 2010 – Rome, 13-15 December 2010 Session MTM-7 Metamaterials theory and modeling Chairperson: S. Hrabar, University of Zagreb 14:00-14:20 P. Fernandes, M. Ottonello, and M. Raffetto Some comments on the solution of the linear algebraic systems defined by the finite element method when applied to electromagnetic problems involving bianisotropic media 14:20-14:40 (withdrawn) G. Conte, G. Finocchio, A. Faba, A. Prattella, B. Azzerboni, E. Cardelli Double negative metamaterials based on ferromagnetic microwire: a numerical study 14:20-14:40 G. Ruffato and F. Romanato Near-field numerical analysis of Surface Plasmon Polariton propagation on metallic gratings 14:40-15:00 A. Massaro, D. Caratelli, A. Yarovoy, R. Cingolani, and A. Athanassiou Accurate circuit modeling for plasmon probe design 15:00-15:20 P. Zilio, D. Sammito, and F. Romanato Role of resonances of digital plasmonic gratings in absorption profile remodulation 61
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Meta 2010 & FEM 2010 – Rome, 13-15 December 2010<br />
Session MTM-7<br />
Metamaterials theory and modeling<br />
Chairperson: S. Hrabar, University of Zagreb<br />
14:00-14:20<br />
P. Fernandes, M. Ottonello, and M. Raffetto<br />
Some comments on the solution of the linear algebraic systems defined<br />
by the finite element method when applied to electromagnetic problems<br />
involving bianisotropic me<strong>di</strong>a<br />
14:20-14:40 (withdrawn)<br />
G. Conte, G. Finocchio, A. Faba, A. Prattella, B. Azzerboni, E.<br />
Cardelli<br />
Double negative metamaterials based on ferromagnetic microwire: a<br />
numerical study<br />
14:20-14:40<br />
G. Ruffato and F. Romanato<br />
Near-field numerical analysis of Surface Plasmon Polariton<br />
propagation on metallic gratings<br />
14:40-15:00<br />
A. Massaro, D. Caratelli, A. Yarovoy, R. Cingolani, and A.<br />
Athanassiou<br />
Accurate circuit modeling for plasmon probe design<br />
15:00-15:20<br />
P. Zilio, D. Sammito, and F. Romanato<br />
Role of resonances of <strong>di</strong>gital plasmonic gratings in absorption profile<br />
remodulation<br />
61
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