Understanding Yb<sup>3+</sup>-sensitized photon avalanche in Pr<sup>3+</sup> co-doped nanocrystals: modelling and optimization

Dudek, Magdalena; Korczak, Zuzanna; Prorok, Katarzyna; Bezkrovnyi, Oleksii; Sun, Lining; Szalkowski, Marcin; Bednarkiewicz, Artur

doi:10.1039/d3nr04409b

Cited by 2 publications

(1 citation statement)

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“…However, the photon avalanche process is governed by complex luminescence kinetics that are influenced by various factors such as the absorption cross-sections, cross-relaxation dynamics, and electron-phonon interactions 17,18 . Notably, lanthanide ions typically undergo electronic transitions through changes in electric dipole (ED) moment, although magnetic dipole (MD) transitions also play a critical role in certain scenarios.…”

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confidence: 99%

Extreme Optical Nonlinearity (> 500) at Room Temperature through Sublattice Reconstruction

Liu,

Chen,

Liu

et al. 2024

Preprint

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The ability of materials to respond to optical stimuli with significant nonlinearity is crucial for technological progress and innovation. Although photon avalanche upconversion nanomaterials with optical nonlinearities over 40 are known, surpassing this level for practical use has remained a challenge. Here, we demonstrate that it is possible to significantly enhance optical nonlinearity in photon avalanches to values beyond 500 by reconstructing the sublattice within an expanded avalanche network. Experimental investigations reveal that this substantial boost in nonlinearity is mainly due to an amplified disparity between electric dipole and magnetic dipole transitions, caused by local crystal field distortions upon lanthanide doping. These distortions preferentially support excited-state absorption governed by electric dipole transitions, which sharply contrasts with ground-state absorption strongly contributed by magnetic dipole transitions, thereby drastically enhancing photon avalanching efficiency. This improvement in optical nonlinearity enhances lateral and axial resolutions to 33 nm and 80 nm, respectively. Our research also reveals that nanocrystals exhibit regional differentiation, showing significant variations in optical performance across different regions of the nanocrystals. This finding enables the visualization of nanoemitters at a resolution and level of detail exceeding their actual size, thereby overcoming the constraints of conventional imaging methods. These developments should pave the way for significant improvements in super-resolution imaging, ultra-sensitive sensing, on-chip optical switching, and infrared quantum counting.

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confidence: 99%

Extreme Optical Nonlinearity (> 500) at Room Temperature through Sublattice Reconstruction

Liu,

Chen,

Liu

et al. 2024

Preprint

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Rare-earth upconversion luminescence and its applications: from molecular to nano and micro scales

Sun,

Sun

2024

Including Actinides Women's Contribution to F-Element Science, Part 1

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Understanding Yb³⁺-sensitized photon avalanche in Pr³⁺ co-doped nanocrystals: modelling and optimization

Abstract: Multicolor photon avalanche emission of Pr3+ doped NaYF4 nanocrystals under 852 nm excitation is enabled by co-doping sensitizer Yb3+ ions.

Cited by 2 publications

References 26 publications

Extreme Optical Nonlinearity (> 500) at Room Temperature through Sublattice Reconstruction

Extreme Optical Nonlinearity (> 500) at Room Temperature through Sublattice Reconstruction

Rare-earth upconversion luminescence and its applications: from molecular to nano and micro scales

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Understanding Yb3+-sensitized photon avalanche in Pr3+ co-doped nanocrystals: modelling and optimization

Abstract: Multicolor photon avalanche emission of Pr3+ doped NaYF4 nanocrystals under 852 nm excitation is enabled by co-doping sensitizer Yb3+ ions.

Cited by 2 publications

References 26 publications

Extreme Optical Nonlinearity (&gt; 500) at Room Temperature through Sublattice Reconstruction

Extreme Optical Nonlinearity (&gt; 500) at Room Temperature through Sublattice Reconstruction

Rare-earth upconversion luminescence and its applications: from molecular to nano and micro scales

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Understanding Yb³⁺-sensitized photon avalanche in Pr³⁺ co-doped nanocrystals: modelling and optimization

Extreme Optical Nonlinearity (> 500) at Room Temperature through Sublattice Reconstruction

Extreme Optical Nonlinearity (> 500) at Room Temperature through Sublattice Reconstruction