Title :
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
fDate :
6/15/2008 12:00:00 AM
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.923546
