Title :
Demonstration of Ultraslow Modes in Asymmetric Line-Defect Photonic Crystal Waveguides
Author :
Ma, Jing ; Jiang, Chun
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Shanghai Jiao Tong Univ., Shanghai
fDate :
7/15/2008 12:00:00 AM
Abstract :
We propose an asymmetric photonic crystal (PC) waveguide, formed by moving the PC cladding on one side of the line defect along the waveguide core. By adjusting the structural parameters, we flatten the slow-mode dispersion curve, exclude the extreme points from the flat band, and avoid the unacceptably large dispersion induced by extreme points. We obtain an ultra-flat band with an inflection point corresponding to a slow-light mode with reduced distortion. We utilize the finite-difference time-domain method to verify the inflection-point ultraslow wave.
Keywords :
finite difference time-domain analysis; optical dispersion; optical fibre cladding; optical waveguides; photonic crystals; PC cladding; asymmetric photonic crystal waveguide; finite-difference time-domain method; inflection-point ultraslow wave; line-defect photonic crystal waveguides; reduced distortion; slow-light mode; slow-mode dispersion curve; structural parameters; ultraslow modes; Fabrication; Finite difference methods; Lattices; Optical waveguides; Photonic band gap; Photonic crystals; Slow light; Structural engineering; Surges; Time domain analysis; Dispersion; flat band; group velocity; inflection point; photonic crystal (PC); slow light;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.926018