Temporal dynamics of upconversion luminescence in Er3+, Yb3+ co-doped crystalline KY(WO4)2 thin films |
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| Authors: | S García-Revilla R Valiente YE Romanyuk M Pollnau |
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| Institution: | 1. Departmento de Física Aplicada, Facultad de Ciencias, Universidad de Cantabria, Avda. de Los Castros s/n, 39005 Santander, Spain;2. Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA;3. Integrated Optical Micro Systems Group, MESA+Research Institute, University of Twente, NL-7500 AE Enschede, The Netherlands;1. Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain;2. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, 28049 Madrid, Spain;3. Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain |
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| Abstract: | Crystalline Er3+ and Yb3+ singly and doubly doped KY(WO4)2 thin films were grown by low-temperature liquid-phase epitaxy. Absorption, luminescence, excitation and temporal evolution measurements were carried out for both Er3+ and Yb3+ transitions from 10 K to room temperature. Green Er3+ upconversion luminescence was observed after Yb3+ and Er3+ excitation. The mechanisms responsible for the upconversion phenomena detected in each case were identified. |
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