Study of High Efficiency Grating Couplers for Silicon-Based Horizontal Slot Waveguides

Author

Galan, J.V. ; Sanchis, P. ; Blasco, J. ; Marti, J.

Author_Institution

Valencia Nanophotonics Technol. Center, Univ. Politec. de Valencia, Valencia

Volume

20

Issue

12

fYear

2008

fDate

6/15/2008 12:00:00 AM

Firstpage

985

Lastpage

987

Abstract

Horizontal slot waveguides are becoming a very promising waveguide configuration for silicon photonics nonlinear applications. In this letter, the design of grating couplers for highly efficient coupling between standard single-mode fibers and horizontal slot waveguides is reported. Parameters have been optimized to achieve maximum coupling efficiency for lambda = 1550 nm and transverse magnetic polarization. Maximum coupling efficiencies of 61% and 48% have been achieved for negative and positive detuned grating couplers, respectively, by means of simulations. A 35-nm 1-dB bandwidth spectral response has also been obtained.

Keywords

diffraction gratings; elemental semiconductors; integrated optics; optical couplers; optical waveguides; silicon; Si; dielectric waveguides; grating couplers; integrated circuits; silicon-based horizontal slot waveguides; single-mode fibers; transverse magnetic polarization; CMOS technology; Coupling circuits; Diffraction gratings; Fiber gratings; Optical fiber couplers; Optical fiber polarization; Optical materials; Optical waveguides; Photonics; Silicon; Couplers; dielectric waveguides; gratings; integrated circuits;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.923546

Filename

4523971