TITLE:
Influences of the Shape of Rods in Two Dimension Photonic Crystals on Their Defect Eigenmodes
AUTHORS:
Guo-Hong Xiao, Li-Qing Huang
KEYWORDS:
Photonic Crystal; Structure Parameter; Defect Eigenmode; Rod Shape
JOURNAL NAME:
Optics and Photonics Journal,
Vol.3 No.4,
August
8,
2013
ABSTRACT: The cross section of photonic crystal fiber (PCF) is a
two dimensional photonic crystal. The rods formed in PCF are not exact
cylinders, the shape of rods will affect the eigenmode formed in two
dimensional photonic crystals around a defect. Based on the relations between
the defect eigenmodes and the radius of dielectric cylinders, the defect
eigenmodes in photonic crystals in which the ellipse rods take the place of
cylinders are studied by numerical calculation. The analysis of the relation
between the eigenfrequency and the minor axis radius of ellipse rods show that the defect eigenfrequency is controlled by
the cross section area of rods and the distribution of electromagnetic field
around the defect is also affected by the cross section shape of rods. It
provides a better way to modify the distribution of electromagnetic fields in
photonic crystal and keeps the eigenfrequency unchanged.