[2008] Physical configuration and performance modeling of all-dielectric metamaterials英文版本.pdf

PHYSICAL REVIEW B 77, 045104 2008 Physical configuration and performance modeling of all-dielectric metamaterials Akram Ahmadi and Hossein Mosallaei* Applied Electromagnetics Lab., ECE Department, Northeastern University, Boston, Massachusetts 02115, USA Received 17 April 2007; revised manuscript received 20 September 2007; published 4 January 2008 In this paper, physical concept and performance analysis of all-dielectric metamaterials are presented. Metamaterials with desired material parameters ± , ± are developed by creating electric and magnetic resonant modes. Dielectric disk and spherical particle resonators are considered as the great candidates for establishing the dipole moments metamaterial alphabet. A full wave finite difference time domain technique is applied to comprehensively obtain the physical insights of dielectric resonators. Near-field patterns are plotted to illustrate the development of electric and magnetic dipole fields. Geometric-polarization control of the dipole moments allows and to be tailored to the application of interest. All-dielectric double negative metamaterials are designed. Engineering concerns, such as loss reduction and bandwidth enhancement are investigated. DOI: 10.1103/PhysRevB.77.045104 PACS numbers: 42.70.Qs, 94.20.ws I. INTRODUCTION sically, they proposed two sets of spheres having the same dielectric materials b