Application of a transfer matrix method to hollow-core Bragg fiber with a gold layer

摘要

For a hollow-core Bragg fiber, the field is represented by a Besselfunction of the first kind in the core region, a linear combination of Bessel functionsof the first and second kinds in the dielectric interior layers, a linear combination ofthe Hankel functions in the gold region and a Hankel function of the first kind in theexternal infinite medium. Our analytical method is applied for different structuresmade from 19, 11, and 5 layers. When a high index material just before the outermostregion of a hollow-core Bragg fiber is replaced by a gold layer, the opticalconfinement for the TE01 mode in the core is increased about ten times. If the goldlayer is located between the first and the penultimate layer, the loss for the same modeis increased.