Rumyantsev V.V., Fedorov S.A., Gumennyk K.V. Peculiarities of Band Gap Width Dependence Upon Concentration of Admixtures Randomly Included in 1D Photonic Crystal

Peculiarities of band gap width dependence upon concentration of admixtures randomly included in 1D photonic crystal. — New York: Nova Science Publishers, Inc. — 2011. — viii, 34 p. — (Materials Science and Technologies). — ISBN 978-1-61324-129-5.1D photonic crystalline superlattice is modeled as both a layered crystal and striped thin film. These 1D systems are sets of elements (layers or strips) with randomly included extrinsic (with respect to the ideal superlattices) elements (layers or strips) of a variable thickness or composition. The photon modes spectrum of a non-ideal superlattice with an arbitrary number of layers (strips) per elementary cell, obtained within the virtual crystal approximation, is concretized for the Si — diamond layered system, Si-liquid crystal and Si/SiO₂/GaAs striped film. Dependence of the band gap width upon concentration of admixture elements and refractive index peculiarities is analyzed. The study carried out shows that optical characteristics of the nonideal photonic crystals may vary due to transformation of its photon modes spectrum caused by the presence of admixture elements (layers or strips).Preface.
Introduction.
Propagation of Electromagnetic Waves in Inhomogeneous Structures.
Dependence of the Polariton Spectrum on the Concentration of Impurity Layers in a Nonideal Superlattice.
Propagation of Electromagnetic Excitation in Imperfect Quasi-Two-Dimensional Photonic 1D Crystal.
Conclusion.
References.
Index.