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Broadband NIR Emission in Sol–Gel Er3+-Activated SiO2–Ta2O5 Glass Ceramic Planar and Channel Waveguides for Optical Application

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Abstract:

An Er3+-doped SiO2:Ta2O5 optical channel waveguide and nanocomposite were prepared by the sol–gel route at a Si:Ta 50:50 molar ratio. Channels with an excellent surface profile were easily and quickly fabricated by focusing a femtosecond laser onto the surface of multilayered films deposited on SiO2/Si substrates. In parallel, the same sol used to prepare the film was annealed at 900, 1000, and 1100 °C for 2 h, to get the nanocomposite materials. A broadband NIR emission around 1538 nm, assigned to the 4I13/24I15/2 transition of the Er3+ ions was observed in the nanocomposites of amorphous SiO2 containing dispersed Ta2O5 nanocrystals. The 4I13/2 lifetime and emission bandwidth depend on the annealing temperature. In conclusion, Er3+-doped SiO2:Ta2O5 channel waveguides and nanocomposites are promising materials for photonic applications.

Keywords: BROADBAND NIR EMISSION; CHANNEL WAVEGUIDES; SOL-GEL ER3+-ACTIVATED SIO2-TA2O5 GLASS CERAMIC

Document Type: Short Communication

DOI: http://dx.doi.org/10.1166/jnn.2011.3565

Publication date: March 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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