Low Dispersion Slow Light in Slot Waveguide Grating

Author

Bao, Changjing ; Hou, Jin ; Wu, Huaming ; Zhou, Xu ; Cassan, Eric ; Gao, Dingshan ; Zhang, Xinliang

Author_Institution

Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

23

Issue

22

fYear

2011

Firstpage

1700

Lastpage

1702

Abstract

A novel and simple one-dimensional waveguide grating with two parallel air slots is proposed to support low dispersion slow light. Due to more structural tuning freedoms provided by introduction of the slots, it is easier to achieve the perfect flat and straight slow light mode dispersion curve. Low group dispersion of only 3.38 ps²/mm with a slow light group index of 13 is obtained in a plane wave expansion calculation, which denotes a wide bandwidth of 13.2 nm. This result is also proved by finite-difference time-domain simulation in which the output pulse relative distortion is only 0.96% towards the input pulse.

Keywords

diffraction gratings; finite difference time-domain analysis; optical dispersion; optical distortion; optical tuning; optical waveguides; slow light; air slots; finite-difference time-domain simulation; group dispersion; light mode dispersion curve; low dispersion slow light; one-dimensional slot waveguide grating; plane wave expansion calculation; pulse relative distortion; structural tuning; Bandwidth; Dispersion; Gratings; Optical waveguides; Optimized production technology; Photonic crystals; Slow light; Grating; low dispersion; slot waveguide; slow light;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2167604

Filename

6016208