A1 Refereed original research article in a scientific journal
NIR induced modulation of the red emission from erbium ions for selective lanthanide imaging
Authors: Stefan Krause, Mads Koerstz M, Riikka Arppe-Tabbara, Tero Soukka, Tom Vosch
Publisher: IOP PUBLISHING LTD
Publication year: 2018
Journal: Methods and Applications in Fluorescence
Journal name in source: METHODS AND APPLICATIONS IN FLUORESCENCE
Journal acronym: METHODS APPL FLUORES
Article number: ARTN 044001
Volume: 6
Issue: 4
Number of pages: 6
ISSN: 2050-6120
eISSN: 2050-6120
DOI: https://doi.org/10.1088/2050-6120/aadef1
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/36351249
Upon direct excitation with green light (522 nm), Er3+ ion doped nanoparticles feature a number of radiative and non-radiative decay pathways, leading to distinct and sharp emission lines in the visible and near-infrared (NIR) range. Here we apply, in addition to continuous 522 nm irradiation, a modulated NIR irradiation (1143 nm) to actively control and modulate the red emission intensity (around 650 nm). The modulation of red Er3+ ion emission at a chosen frequency allows us to reconstruct fluorescence images from the Fourier transform amplitude at this particular frequency. Since only the emission from the Er3+ ion is modulated, it allows to selectively recover the lanthanide specific signal, removing any non-modulated auto-fluorescence or background emission resulting from the continuous 522 nm excitation. The modulated emission of specific lanthanides can open up new detection opportunities for selective signal recovery.
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