title: Electromagnetic localization based on transformation optics.
abstract: Localization of an electromagnetic field can be achieved by transformation optics using metamaterials. A coordinate transformation structure different from traditional resonator is proposed. Wherein, arbitrary frequency of the whole band of electromagnetic wave can be localized without energy loss, i.e., the modes in this structure are continuous. Theoretical analysis and numerical simulation show that the material parameter variations at the outer boundary of the structure have little influence on the localization property. When realizable physical structure is considered, multi-layer approximation should be applied. The calculated results show that the estimated localization time is about 100 ns for an 8-layer inhomogeneous approximation, and it could reach several seconds for a 30-layer homogeneous approximation. The present work may present a new application of transformation optics.
authors.affiliation: Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875, China.
authors.forename: Tianrui
authors.initials: T
authors.lastname: Zhai
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhou
authors.forename: Jinwei
authors.initials: J
authors.lastname: Shi
authors.forename: Zhaona
authors.initials: Z
authors.lastname: Wang
authors.forename: Dahe
authors.initials: D
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Zhou
mesh_terms: D017076:Computer-Aided Design; D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055096:Optical Devices; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*