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

Volume

20

Issue

14

fYear

2008

fDate

7/15/2008 12:00:00 AM

Firstpage

1237

Lastpage

1239

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.926018

Filename

4547915