Title :
Double slot high-k waveguide grating couplers for silicon photonics
Author :
Naiini, Maziar M. ; Henkel, Christoph ; Malm, Gunnar B. ; Östling, Mikael
Author_Institution :
Sch. of Inf. & Commun. Technol., Integrated Devices & Circuits, KTH R. Inst. of TechnologyKTH R. Inst. of Technol., Kista, Sweden
Abstract :
Fully etched grating couplers are manufactured for double slot high-k waveguides. These couplers have a maximum efficiency of 22 %. This higher achieved efficiency despite the lack of a matching fluid compared to the case of single slots (18.5 % ) is due to the higher confinement of the optical power in the slot region for the double slot structures. Doubling the slot number reduces the effective refractive index from 2.7 to 2.2.
Keywords :
diffraction gratings; optical couplers; optical fabrication; optical waveguides; refractive index; silicon; silicon compounds; SiO2; double slot high-k waveguide grating couplers; effective refractive index; optical power; silicon photonics; Attenuation; Couplers; Gratings; High K dielectric materials; Optical filters; Optical waveguides; Silicon;
Conference_Titel :
Device Research Conference (DRC), 2012 70th Annual
Conference_Location :
University Park, TX
Print_ISBN :
978-1-4673-1163-2
DOI :
10.1109/DRC.2012.6256930
