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Si nanoparticle–Er3+ coupling through contact in as-deposited nanostructured films

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4 Author(s)
Nunez-Sanchez, S. ; Laser Processing Group, Instituto de Optica, IO-CSIC, Serrano 121, 28006 Madrid, Spain ; Roque, P.M. ; Serna, R. ; Petford-Long, A.K.

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The efficient excitation of Er3+ ions through contact with Si nanoparticles (NPs) is demonstrated. A nanostructured doping process has been developed that leads to contact between Si NPs formed in situ and optically-active Er3+ ions embedded in Al2O3. This is achieved by independent and consecutive deposition of the dopants and matrix. The Si NPEr3+ contact regime enhances the probability of efficient interaction due to the local spatial overlap of the electronic states of the Er3+ and of the Si NP exciton, enabling energy transfer by interband exciton recombination. This leads to up to 53% of the Er3+ ions being excited in as-deposited films.

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Applied Physics Letters  (Volume:98 ,  Issue: 15 )