Subwavelength index engineered surface grating coupler with sub-decibel efficiency for 220-nm silicon-on-insulator waveguides

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1364/OE.23.022628
AuthorSearch for: ; Search for: 1ORCID identifier: https://orcid.org/0000-0003-4232-9130; Search for: 1; Search for: 1; Search for: 1; Search for: 1; Search for: 1; Search for: ; Search for: ; Search for: 1; Search for:
Name affiliation
  1. National Research Council of Canada. Information and Communication Technologies
FormatText, Article
Subjectefficiency; optical fibers; photonic devices; photonic integration technology; refractive index; engineered surfaces; fiber chip coupling; fundamental component; photonic integrated circuits; silicon on insulator waveguide; silicon-on- insulators (SOI); single etch process; surface grating couplers; silicon on insulator technology
Abstract
Surface grating couplers are fundamental components in chip-based photonic devices to couple light between photonic integrated circuits and optical fibers. In this work, we report on a grating coupler with sub-decibel experimental coupling efficiency using a single etch process in a standard 220-nm silicon-on-insulator (SOI) platform. We specifically demonstrate a subwavelength metamaterial refractive index engineered nanostructure with backside metal reflector, with the measured peak fiber-chip coupling efficiency of -0.69 dB (85.3%) and 3 dB bandwidth of 60 nm. This is the highest coupling efficiency hitherto experimentally achieved for a surface grating coupler implemented in 220-nm SOI platform.
Publication date
PublisherThe Optical Society
In
  • Optics Express 23, no. 17: 22628–22635.
LanguageEnglish
Peer reviewedYes
NPARC number21277379
Export citationExport as RIS
Report a correctionReport a correction (opens in a new tab)
Record identifiere2f01bd7-e863-4d77-b50c-f8f8f9bdc747
Record created2016-03-09
Record modified2020-04-22
Report a problem on this page
Date modified: