Sol-gel thin films for photonic application

Jacek J. Jasieniak, Alessandro Martucci

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

For the fabrication of photonic devices the sol-gel technique is a potentially lucrative alternative to methods such as physical vapor or chemical vapor deposition because of its solution-processability, low cost and relative ease of production. In this work we harness this potential by developing based photonic devices which incorporate highly luminescent CdSe@ZnS core-shell semiconductor quantum dots (QDs) doped within inorganic (TiO 2, ZrO 2) or hybrid organic-inorganic sol-gel films. As a pre-requisite to the formation of such devices, luminescent waveguides emitting between green and red have been obtained and their optical properties have been characterized. The photochemical stability of these waveguides was found to highly dependent on the exact sol-gel material used. QDs:Titania based composites were found to be inherently photo-unstable due to photoelectron injection into the bulk matrix and subsequent nanocrystal oxidation. In comparison, zirconia composites were significantly more robust with high photoluminescence retained up to annealing temperatures of 300 °C. Despite this difference in photo-chemical stability, both titania and zirconia composite waveguides exhibited amplified stimulated emission (ASE) with one-photon and two-photon optical pumping, however only zirconia based waveguides exhibited long term photostability. This Zirconia based films have been used for the realization of distributed feedback lasers and Bragg micro-cavities.

Original languageEnglish
Title of host publicationSilicon Photonics and Photonic Integrated Circuits III
PublisherSPIE
Number of pages9
Volume8431
ISBN (Print)9780819491237
DOIs
Publication statusPublished - 2012
Externally publishedYes
EventConference on Silicon Photonics and Photonic Integrated Circuits 2012 - Brussels, Belgium
Duration: 16 Apr 201219 Apr 2012

Conference

ConferenceConference on Silicon Photonics and Photonic Integrated Circuits 2012
CountryBelgium
CityBrussels
Period16/04/1219/04/12
OtherSilicon Photonics and Photonic Integrated Circuits III

Keywords

  • Amplified stimulated emission
  • Distributed feedback laser
  • Micro-cavity
  • Quantum dots
  • Sol-gel
  • Waveguides

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