[Defect modes in one-dimensional comblike photonic crystals].
The photonic band structures and the effect of defect states on photonic band gap in a comblike waveguide geometry which were made of dangling side branches grafted periodically along an infinite monomode waveguide were investigated in this paper. It was discovered that the photonic forbidden bands originates from both the periodicity of the system and the resonance states of the grafted branches. By removing or inserting some defect branches in the star waveguide of finite number of grafted branches, the localized states appear in the transmission spectrum as very narrow peaks. The behavior of the localized states was analyzed as the functions of the length, the position and the number of the defective branches.
Xia
Hui
H
Dept. of Applied Physics, Hunan University, Changsha 410082, China.
Peng
Jing-cui
JC
Zhang
Bo-yun
BY
Li
Hong-jian
HJ
Jian
Zhi-jian
ZJ
Zhou
Ren-long
RL
D003198:Computer Simulation; D003460:Crystallization; D005336:Fiber Optic Technology; D008962:Models, Theoretical; D017785:Photons; D011827:Radiation