Low-temperature behavior of magnetic metamaterial elements
Date
2009
Authors
Advisor
Instructor
Source Title
New Journal of Physics
Print ISSN
1367-2630
Electronic ISSN
Publisher
Institute of Physics Publishing Ltd.
Volume
11
Issue
Pages
043015-8 - 043015-1
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract
Periodically arranged metallic resonators can produce a negative permeability medium. However, the resonant response weakens at extreme regimes under certain conditions, which is the major problem of obtaining a negative index in the visible regime. We report that by decreasing the operation temperature, the metal conductivity can be increased, enhanced negative permeability can be obtained and the operation range of the negative permeability media, and thereby the negative index media, can be extended. We doubled the resonant strength of a typical resonator operating at microwave frequencies by decreasing its temperature to 150 K. The results are promising for the demonstration of negative index media in the visible regime.