Investigation of one-dimensional photonic bandgap structures containing lossy double-negative metamaterials through the Bloch impedance

TitleInvestigation of one-dimensional photonic bandgap structures containing lossy double-negative metamaterials through the Bloch impedance
Publication TypeJournal Article
Year of Publication2013
AuthorsShi FH, Chen YH, Han P, Soukoulis CM
Journal TitleJournal of the Optical Society of America B-Optical Physics
Volume30
Pages1473-1478
Date Published06
Type of ArticleArticle
ISBN Number0740-3224
Accession NumberWOS:000319739100012
KeywordsCRYSTALS, experimental-verification, refractive-index, spontaneous-emission, wave-guides
Abstract

The Bloch impedance is studied and used to understand the properties of the absorption loss in one-dimensional photonic crystals (PCs) composed of air and metal-based double-negative metamaterials. We find that as the frequency increases across the zero-(n) over bar gap of the considered structures, the modulus of the Bloch impedance always decreases from a maximum to a minimum value. On the other hand, the frequency dependence of the phase angle of the Bloch impedance is greatly influenced by the ratio of the electric to the magnetic damping coefficient gamma(e)/gamma(m) of the metamaterials. When the phase angle of the Bloch impedance reaches maximum inside the zero-(n) over bar gap, the impedance mismatch between the incident medium and the considered PC becomes greatest, the reflection will be strongest and a minimum absorption will be observed. As gamma(e)/gamma(m) increases, the frequency corresponding to the minimum absorption shifts from the lower to the upper gap edge. We also show that the main characteristics of both the Bloch impedance and the absorption loss are insensitive to the geometrical parameters. Our study offers a valuable reference in the designs of zero-(n) over bar gap with optimized properties. (C) 2013 Optical Society of America

URL<Go to ISI>://WOS:000319739100012
DOI10.1364/josab.30.001473