Judd‐Ofelt Calculations for Nd³⁺‐Doped Fluorozirconate‐Based Glasses and Glass Ceramics

Abstract

A Judd-Ofelt analysis is performed to calculate the optical properties of Nd 3+ ions embedded in a fluorozirconate glass matrix. The changes in the Judd-Ofelt parameters were determined as a function of the size of BaCl 2 nanocrystals grown inside the matrix. From these data, the radiative decay rates and the branching ratios of every transition in the energy range from 25.000 cm −1 to the ground state are calculated. This was accomplished for samples containing nanocrystals with average sizes ranging from 10 to 40 nm.

Influence of BaCl2 Nanocrystal Size on the Optical Properties of Nd3+ in Fluorozirconate Glass

“…Table lists the calculated decay rates of several Nd 3+ levels. The comprehensive set of data including the branching ratios and rates for each single sublevel can be accessed in a separate publication . Generally, these values are subject to the usual Judd–Ofelt uncertainty of 10–20% .…”

“…The comprehensive set of data including the branching ratios and rates for each single sublevel can be accessed in a separate publication. 45 Generally, these values are subject to the usual Judd−Ofelt uncertainty of 10−20%. 15 As can be seen from Table 1, all transitions exhibit an increase of their radiative decay rates by around 5−30% when moving from the FZ to the FCZ host.…”

Comprehensive Rate Equation Analysis of Upconversion Luminescence Enhancement Due to BaCl2 Nanocrystals in Neodymium-Doped Fluorozirconate-Based Glass Ceramics

“…The Einstein coefficients used here to describe the spontaneous emission (SPE) are based on the results of a Judd–Ofelt analysis − published previously. , For the case of glass ceramics, this was accomplished by using an effective refractive index medium.…”