Widely tunable directional coupler filters with 1D photonic crystal

Author

Jaskorzynska, Bozena ; Zawistowski, Zygmunt Jacek ; Dainese, Matteo ; Cardin, Julien ; Thylén, Lars

Author_Institution

Dept. of Microelectron. & Inf. Technol., Royal Inst. of Technol., Kista, Sweden

Volume

1

fYear

2005

fDate

3-7 July 2005

Firstpage

136

Abstract

We present two concept examples for adding a wide range tunability to Si/SiO₂ devices involving a photonic crystal element. They are based on a directional coupler filter of two different geometries, where one of the arms is a Bragg reflection waveguide (BRW) used for the bandwidth improvement. The tuning relies on changing the properties of the BRW core. As an illustration we consider the smectic A* liquid crystal as the core material and show that ca 100 nm tuning range is achievable by the core index variations of 0.006 under applying electric field of 5 V/μm.

Keywords

elemental semiconductors; liquid crystal on silicon; optical directional couplers; optical planar waveguides; optical tuning; optical waveguide filters; photonic crystals; silicon; silicon compounds; 1D photonic crystal element; A* liquid crystal; BRW; Bragg reflection waveguide; Si-SiO₂; core index variation; electric field; optical filter; widely tunable directional coupler filter; Arm; Bandwidth; Crystalline materials; Directional couplers; Filters; Geometry; Liquid crystals; Photonic crystals; Reflection; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Transparent Optical Networks, 2005, Proceedings of 2005 7th International Conference

Print_ISBN

0-7803-9236-1

Type

conf

DOI

10.1109/ICTON.2005.1505769

Filename

1505769