Silicon nanocrystals light-emitting devices: Characterization and coupling to SU-8 waveguides

David Izquierdo*, María C. Garralaga, Iñigo Salinas, Jorge Barreto, Carlos Domínguez, Ignacio Garcés

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

1 Citation (Scopus)


Silicon-based light emitting device is the missing piece in the design of complete optoelectronic circuits on silicon. A complete electrical and optical characterization of electroluminescent silicon-nanocrystals based devices is presented. This characterization is the first step in the design of coupling structures with optimal injection of light into optical waveguides, which will allow the development of all-silicon photonic circuits. In this paper, a novel coupling structure based on rectangular surface grating has been studied with promising results, increasing the coupling efficiency to SU-8 waveguides up to 25 times. The SU-8 photoresist is fully compatible with silicon technology and can be used to define waveguides as well as microfluidics channels. These properties are interesting for the final application of the present study, which is to obtain a Lab-on-a-chip device, integrating all the optical elements, control electronics and microfluidics channels.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2010
EventSilicon Photonics and Photonic Integrated Circuits II - Brussels, Belgium
Duration: 12 Apr 201016 Apr 2010


ConferenceSilicon Photonics and Photonic Integrated Circuits II


  • couplers
  • diffraction
  • gratings
  • Integrated optics
  • nanocrystals
  • polymers
  • Silicon
  • waveguides


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