Near-infrared emitting NaLuF4: Yb3+, Er3+, Ce3+ nanoparticles for compact waveguide amplifiers and bioimaging
Khaydukov K.V. 1,2, Krylov I.V. 1, Nikolaeva M.E. 3,2, Rocheva V.V. 1, Khaydukov E.V. 1,2
1Federal Research Center "Crystallography and Photonics", Russian Academy of Sciences, Moscow, Russia
2Moscow Pedagogical State University, Moscow, Russia
3Limited Liability Company Syntol, Moscow, Russia
Email: haidukov_11@mail.ru, Ivan_Krylov@bk.ru, mesarycheva@gmail.com, vrocheva@mail.ru, khaydukov@mail.ru

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Fluoride nanocrystals co-doped with lanthanide ions are well known due to the possibility of conversion near-infrared (NIR) radiation into photoluminescence with large anti-Stokes shift. Owing to upconversion effect, such nanomaterials have shown great potential in photonics and biomedicine. However, fluoride nanoparticles can be reconfigured to photoluminescence with a Stokes shift into the near-infrared region of the spectrum. In this work, we focused on the properties of NaRF4 : Yb3+, Er3+, Ce3+ (R = Y, Lu) nanoparticles exhibiting intense stokes luminescence in the vicinity of 1530 nm at 975 nm excitation. Photoluminescence quantum efficiency of synthesized nanoparticles was evaluated as 28% at 0.6 W/cm2 excitation intensity. Based on the photoluminescent properties of nanoparticles we designed compact waveguide amplifier for C-band telecommunication and developed time gated imaging system for NIR-to-NIR biovisualization. Keywords: waveguide amplifier, fluoride nanocrystals, bioimaging, polymer waveguides, NaLuF4 : Yb3+, Er3+, Ce3+.
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