Paloma Rodriguez-Sevilla , Hector Rodriguez-Rodriguez , Marco Pedroni , Adolfo Speghini , Marco Bettinelli , Jose Antonio Garcia Sole , Daniel Jaque , and Patricia Haro-Gonzalez
We report on stable, long-term immobilization and localization of a single colloidal Er3+/Yb3+ codoped upconverting fluorescent nanoparticle (UCNP) by optical trapping with a single infrared laser beam. Contrary to expectations, the single UCNP emission differs from that generated by an assembly of UCNPs. The experimental data reveal that the differences can be explained in terms of modulations caused by radiation-trapping, a phenomenon not considered before but this work reveals to be of great relevance.
DOI
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