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Optically active Er3+ ions in SiO2 codoped with Si nanoclusters
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Optical properties of directly excited erbium (Er3+) ions have been studied in silicon rich silicon oxide materials codoped with Er3+. The spectral dependence of the direct excitation cross section (σdir) of the Er3+ atomic I415/2→I411/2 transition (around 0.98 μm) has been measured by time resolved μ-photoluminescence measurements. We have determined that σdir is 9.0±1.5×10−21 cm2 at 983 nm, at least twice larger than the value determined on a stoichiometric SiO2 matrix. This result, in combination with a measurement of the population of excited Er3+ as a function of the pumping flux, has allowed quantifying accurately the amount of optically active Er3+. This concentration is, in the best of the cases, 26% of the total Er population measured by secondary ion mass spectrometry, which means that only this percentage could provide optical gain in an eventual optical amplifier based on this material.
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NAVARRO URRIOS, Daniel, et al. Optically active Er3+ ions in SiO2 codoped with Si nanoclusters. Journal of Applied Physics. 2009. Vol. 106, num. 9, pags. p. [consulted: 19 of August of 2026]. Available at: https://hdl.handle.net/2445/15662