Abstract
We propose a homogenization scheme for metamaterials that utilizes causality to determine their effective parameters. By requiring the Kramers-Kronig causality condition in the homogenization of metamaterials, we show that the effective parameters can be chosen uniquely, in contrast to the conventional parameter retrieval method which has unavoidable phase ambiguity arising from the multivalued logarithm function. We demonstrate that the effective thickness of metamaterials can also be determined to a specific value by saturating the minimum-error condition for the causality restriction. Our causal homogenization provides a robust and accurate characterization method for metamaterials.
| Original language | English |
|---|---|
| Pages (from-to) | 1063-1069 |
| Number of pages | 7 |
| Journal | Nanophotonics |
| Volume | 8 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2019 Jan 1 |
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Keywords
- causality
- effective medium theory
- homogenization
- metamaterials
- parameter retrieval method
ASJC Scopus subject areas
- Biotechnology
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
Cite this
Causal homogenization of metamaterials. / Yoo, Seokjae; Lee, Suyeon; Choe, Jong Ho; Park, Q Han.
In: Nanophotonics, Vol. 8, No. 6, 01.01.2019, p. 1063-1069.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Causal homogenization of metamaterials
AU - Yoo, Seokjae
AU - Lee, Suyeon
AU - Choe, Jong Ho
AU - Park, Q Han
PY - 2019/1/1
Y1 - 2019/1/1
N2 - We propose a homogenization scheme for metamaterials that utilizes causality to determine their effective parameters. By requiring the Kramers-Kronig causality condition in the homogenization of metamaterials, we show that the effective parameters can be chosen uniquely, in contrast to the conventional parameter retrieval method which has unavoidable phase ambiguity arising from the multivalued logarithm function. We demonstrate that the effective thickness of metamaterials can also be determined to a specific value by saturating the minimum-error condition for the causality restriction. Our causal homogenization provides a robust and accurate characterization method for metamaterials.
AB - We propose a homogenization scheme for metamaterials that utilizes causality to determine their effective parameters. By requiring the Kramers-Kronig causality condition in the homogenization of metamaterials, we show that the effective parameters can be chosen uniquely, in contrast to the conventional parameter retrieval method which has unavoidable phase ambiguity arising from the multivalued logarithm function. We demonstrate that the effective thickness of metamaterials can also be determined to a specific value by saturating the minimum-error condition for the causality restriction. Our causal homogenization provides a robust and accurate characterization method for metamaterials.
KW - causality
KW - effective medium theory
KW - homogenization
KW - metamaterials
KW - parameter retrieval method
UR - http://www.scopus.com/inward/record.url?scp=85067439989&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85067439989&partnerID=8YFLogxK
U2 - 10.1515/nanoph-2019-0069
DO - 10.1515/nanoph-2019-0069
M3 - Article
AN - SCOPUS:85067439989
VL - 8
SP - 1063
EP - 1069
JO - Nanophotonics
JF - Nanophotonics
SN - 2192-8606
IS - 6
ER -