Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics III
Q 62.55: Poster
Thursday, March 26, 2015, 17:00–19:00, C/Foyer
High Fluorescent Yield of Ion Implanted Rare-Earth-Dopants in YAG — •Thomas Kornher1, Nadezhda Kukharchyk2, Kangwei Xia1, Roman Kolesov1, Andreas D. Wieck2, and Jörg Wrachtrup1 — 13. Physikalisches Institut, Universität Stuttgart, Germany — 2Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Germany
Rare-earth dopants in crystals exhibit long optical coherence times, which makes them promising candidates not only as quantum storage devices for photons. Due to demonstrated detection on a single ion level and optical accessibility of their spin degrees of freedom, such systems are also investigated for their potential as quantum computation platform. Doping of optical crystals by means of ion implantation gives rise to preparation of rare-earth ions in selected locations. Studying their fluorescence yield in optical crystals is a step towards a more controlled fabrication of mentioned quantum devices.
The high quantum yield of Ce3+ emission and successful implantation in YAG acts as motivation to further analyze the stabilization of implanted cerium ions in the favored valence state. During implantation and the subsequent annealing process, trivalent cerium ions tend to lose an electron and form a dark tetravalent state. Therefore, investigation of different annealing atmospheres and variation of implantation parameters becomes the focus of attention. Measured fluorescence yield acts as an indicator for the successful activation of implanted cerium ions by annealing in an inert gas atmosphere or alternatively in a reducing one.