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Optics and Spectroscopy, 2023 Volume 131, Issue 5, Pages 655–666 (Mi os1359)

The 18th International Theophilus Symposium (IFAC-2022) on Spectroscopy of Crystals Activated by Ions of Rare Earths and Transition Metals (August 22-26, 2022, Moscow)
Nanophotonics

Near-infrared emitting NaLuF$_4$: Yb$^{3+}$, Er$^{3+}$, Ce$^{3+}$ nanoparticles for compact waveguide amplifiers and bioimaging

K. V. Khaydukovab, I. V. Krylova, M. E. Nikolaevabc, V. V. Rochevaa, E. V. Khaidukovba

a Federal Research Center "Crystallography and Photonics", Russian Academy of Sciences, Moscow, Russia
b Moscow Pedagogical University, Moscow, Russian Federation, Moscow, Russia
c Research and Production Company "NPF LLC Sintol", 127434 Moscow, Russia

Abstract: 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 NaRF$_4$: Yb$^{3+}$, Er$^{3+}$, Ce$^{3+}$ (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/cm$^2$ 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, NaLuF$_4$: Yb$^{3+}$, Er$^{3+}$, Ce$^{3+}$.

Received: 23.11.2022
Revised: 20.02.2023
Accepted: 22.02.2023

DOI: 10.21883/OS.2023.05.55718.75-22



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