Dispersion Engineering of Wide Slot Photonic Crystal Waveguides by Bragg-Like Corrugation of the Slot

Author

Caer, Charles ; Roux, Xavier Le ; Van Khanh Do ; Marris-morini, Delphine ; Izard, Nicolas ; Vivien, Laurent ; Gao, Dingshan ; Cassan, Eric

Author_Institution

Inst. d´´Electron. Fondamentale, Univ. Paris-Sud, Orsay, France

Volume

23

Issue

18

fYear

2011

Firstpage

1298

Lastpage

1300

Abstract

A comb slot photonic crystal waveguide geometry allowing flexible dispersion engineering of wide slot photonic crystal waveguides is proposed. Additionally, a figure of merit combining confinement within the slot and high group index is introduced to quantify the electromagnetic density within slow wave slot waveguides, and is applied to the proposed waveguide geometries. Group indices exceeding 130 and 90 over bandwidths of 1.5 and 2 nm are achieved for slots wider than 300 nm. The figure of merit exhibits sevenfold and fortyfold enhancements in comparison with classical slot waveguides with slot widths around 50 and 100 nm, respectively.

Keywords

optical dispersion; optical waveguides; photonic crystals; slow light; Bragg like corrugation; comb slot photonic crystal waveguide; dispersion engineering; electromagnetic density; high group index; slow wave slot waveguide; wide slot photonic crystal waveguide; Dispersion; Indexes; Nonlinear optics; Optical signal processing; Optical waveguides; Photonic crystals; Silicon photonics; slot waveguides; slow wave;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2158996

Filename

5871678