A Hybrid Plasmonic Waveguide for the Propagation of Surface Plasmon Polariton at 1.55 μm on SOI Substrate

Author

Amirhosseini, Asad ; Safian, Reza

Author_Institution

Dept. of Electr. & Comput. Eng., Isfahan Univ. of Technol., Isfahan, Iran

Volume

12

Issue

6

fYear

2013

fDate

Nov. 2013

Firstpage

1031

Lastpage

1036

Abstract

A hybrid plasmonic waveguide (HPW) has been numerically investigated, based on silicon-on-insulator (SOI) structure near the telecom wavelength λ = 1550 nm using the finite-element method. The HPW consists of metal cap placed on SOI rib, which has a trench with a semicircle interface at the bottom of the trench. With the proper choice of waveguide sizes, our proposed HPW can support hybrid long-range surface plasmon which have strong mode confinement A_eff/A₀ ≅ 0.0035-0.035 and long propagation length (L_eff > 525 μm) simultaneously. In addition, for the proposed HPW, the calculated coupling length for two parallel identical waveguides which is separated by distance d = 250 nm is approximately 1.3 μm, which is very helpful in realizing photonic integration circuits with ultrahigh integration density.

Keywords

elemental semiconductors; finite element analysis; optical waveguides; plasmonics; polaritons; silicon; silicon-on-insulator; surface plasmons; SOI rib; SOI substrate; Si; coupling length; finite-element method; hybrid long-range surface plasmon; hybrid plasmonic waveguide; metal cap; mode confinement; parallel waveguides; photonic integration circuits; propagation length; semicircle interface; silicon-on-insulator structure; surface plasmon polariton propagation; ultrahigh integration density; waveguide sizes; wavelength 1550 nm; Coupling length; figure of merit (FOM); silicon-on-insulator (SOI) substrate; surface plasmon polariton (SPP);

fLanguage

English

Journal_Title

Nanotechnology, IEEE Transactions on

Publisher

ieee

ISSN

1536-125X

Type

jour

DOI

10.1109/TNANO.2013.2263987

Filename

6517238