Open AccessElectromagnetic localization based on transformation optics
Author(s) -
Tianrui Zhai,
Ying Zhou,
Jianzhong Shi,
Zhaona Wang,
Dahe Liu,
Jing Zhou
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.011891
Subject(s) - transformation optics , optics , metamaterial , physical optics , physics , resonator , transformation (genetics) , geometrical optics , electromagnetic radiation , electromagnetic field , coordinate system , perfectly matched layer , finite difference time domain method , geometry , mathematics , quantum mechanics , biochemistry , chemistry , gene
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.