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Nanostructuring the Er3+ distribution in PbO-Nb2O5-GeO2 thin film glasses

AuthorsMorea, Roberta ; Miguel, A.; Fernández Navarro, José María ; Gonzalo de los Reyes, José; Fernández, Joaquín ; Balda, Rolindes
Issue Date2014
AbstractRare earth (RE) doped thin film materials are essential for the miniaturisation of active photonic devices in optical communication technologies. In particular, the distribution and concentration of dopant RE ions are critical on the photoluminescence (PL) response. In this work we show that alternate pulsed laser deposition (a-PLD) allows the synthesis of nanostructured thin film glasses with an in-depth RE distribution that is pre-designed at the nanometer scale through the control of the ablation sequence and time of the host and dopant targets, which allows improving the PL performance of the films. Er-doped thin films consisting of 50 alternating layers of glass and Er3+ ions were produced in a single-step from pure glass (PbO-Nb2O5-GeO2) and metallic Er targets by a-PLD. PL intensity at 1530 nm (Fig.1) is maximized for an in-depth separation between consecutive layers of Er3+ ions ≥ 5 nm, whereas it is also possible to increase the PL intensity maintaining its lifetime around 3 ms (Fig. 2) for an Er3+ concentration per layer ≤ 20 x 1013 atoms cm-2. The experimental results are discussed in terms of the probability of nonradiative energy transfer between Er3+ ions.
DescriptionResumen del trabajo presentado al 5th International Workshop on Photoluminescence in Rare Earths: "Photonic Materials and Devices", celebrado en San Sebastián (España) del 13 al 16 de mayo de 2014.
Appears in Collections:(CFMAC-IO) Comunicaciones congresos
(CFM) Comunicaciones congresos
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