Directional-Coupler-Based Polarization Splitting in Asymmetric Metal/Multi-Insulator Configuration for Optical Nanocircuitry

Author

Chang, Yin-Jung ; Li, Wei-Lun

Author_Institution

Dept. of Opt. & Photonics, Nat. Central Univ., Jhongli, Taiwan

Volume

24

Issue

6

fYear

2012

fDate

3/15/2012 12:00:00 AM

Firstpage

458

Lastpage

460

Abstract

An ultra-compact polarization splitter based on asymmetric metal/multi-insulator directional coupler is proposed and investigated analytically and numerically. A large modal birefringence of >;0.69 is estimated, enabling a clean polarization selective directional coupling within 5.6. The insertion loss of and the splitting and extinction ratios of <;-0.32 are predicted. Modified coupled-mode equations for a coupled lossy waveguide system are also presented.

Keywords

birefringence; coupled mode analysis; extinction coefficients; light polarisation; metal-insulator boundaries; optical beam splitters; optical directional couplers; optical losses; optical waveguides; asymmetric metal-multiinsulator configuration; coupled lossy waveguide system; coupled-mode equations; directional-coupler-based polarization splitting; extinction ratios; insertion loss; modal birefringence; optical nanocircuitry; polarization selective directional coupling; splitting ratios; ultracompact polarization splitter; Couplings; Optical waveguides; Photonics; Silicon; Silicon compounds; Silver; Coupled-mode analysis; plasmonic waveguides; polarization splitters; surface plasmons;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2181352

Filename

6111439