Lossy metamaterials: No effective medium properties without noise
File(s)
Accepted version
Author(s)
Syms, RRA
Sydoruk, O
Solymar, L
Type
Journal Article
Abstract
Lossy metamaterial elements act as sources of Johnson noise, making such materials inherently noisy. A coupled transmission line model capable of describing the effective medium properties, propagation and internal reflections, the internal noise distribution, and the noise factor is developed. Two analyses are provided, a numerical solution with limited physical insight and an approximation based on physical principles, and excellent agreement is obtained. It is shown that the internal noise spectrum is modified as it couples to the electromagnetic wave, and that there can be no change in permeability without an increase in the noise factor. This result implies that metamaterials will require careful evaluation of their noise performance before use in practical devices.
Date Issued
2011-12-30
Citation
PHYSICAL REVIEW B, 2011, 84 (23)
ISSN
1098-0121
Publisher
AMER PHYSICAL SOC
Journal / Book Title
PHYSICAL REVIEW B
Volume
84
Issue
23
Copyright Statement
© 2011 American Physical Society
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000298637700002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Condensed Matter
Physics
FLUCTUATION-DISSIPATION THEOREM
SPLIT-RING RESONATORS
TRANSMISSION-LINES
NEGATIVE-INDEX
WAVE-GUIDE
PERMITTIVITY
PERMEABILITY
CONDUCTORS
MICROWAVE
NETWORKS
Publication Status
Published
Article Number
ARTN 235150