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Diode-Pumped Violet Energy Upconversion in BaF(2):Er(3+).

D N Patel, R B Reddy, S K Nash-Stevenson

    Applied Optics
    |February 28, 2008
    PubMed
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    Researchers observed strong upconversion signals in Barium Fluoride doped with Erbium (BaF(2):Er(3+)) under diode-laser excitation. This study details the energy upconversion processes and calculates key intensity parameters for Er(3+) in BaF(2).

    Area of Science:

    • Materials Science
    • Solid-State Physics
    • Photonics

    Background:

    • Upconversion luminescence in rare-earth doped materials is crucial for advanced optical applications.
    • Barium Fluoride (BaF(2)) is a promising host matrix for rare-earth ions due to its wide bandgap and chemical stability.
    • Erbium (Er(3+)) ions exhibit characteristic luminescence properties exploitable in various technologies.

    Purpose of the Study:

    • To investigate the upconversion luminescence properties of Erbium-doped Barium Fluoride (BaF(2):Er(3+)).
    • To analyze the energy upconversion mechanisms and quantify their efficiencies.
    • To determine the Judd-Ofelt intensity parameters for Er(3+) ions in the BaF(2) host.

    Main Methods:

    • Optical excitation of BaF(2):Er(3+) using an 805-nm diode laser.

    Related Experiment Videos

  • Spectroscopic analysis to detect and characterize upconversion emission signals.
  • Application of theoretical models to determine energy upconversion schemes and Judd-Ofelt parameters.

    • Main Results:

    • Intense upconversion signals were observed at 410 nm, 380 nm, and 275 nm.
    • Detailed discussion of the energy upconversion pathways and their respective efficiencies.
    • Derivation of Judd-Ofelt intensity parameters (Omega(2), Omega(4), Omega(6)) for Er(3+) in BaF(2).

    Conclusions:

    • BaF(2):Er(3+) exhibits efficient upconversion luminescence under 805-nm excitation.
    • The determined Judd-Ofelt parameters provide crucial insights into the optical properties of Er(3+) in BaF(2).
    • This research contributes to the understanding of upconversion processes for potential applications in lasers, sensors, and bio-imaging.