Line Broadening Mechanisms and Their Measurement

Optical Line Width Broadening Mechanisms at the 10 kHz Level in Eu3+:Y2O3 Nanoparticles

“…The other component of our study was investigating the broadening on longer time scales. The three pulse echo measurements show that spectral diffusion at 1.3 K is less than 100 kHz for time scales less than 1 ms and less than 200 kHz for time scales up to 1 s. The observed rate of spectral diffusion is at least an order of magnitude less than the rates measured in other disordered systems such as glasses and previous studies on Eu 3+ :Y 2 O 3 nanoparticles . Although low for a disordered material, the rate of spectral diffusion for the nanoparticles studied in this work is large compared to bulk Eu 3+ :Y 2 SiO 5 , in which no observable spectral diffusion is exhibited on 10 ms time scales .…”

“…The measured temperature dependence of Γ h (equal to half the measured hole width) is shown in Figure . This figure also shows the fit of the data according to the model where Γ 0 is the temperature independent broadening, Γ l is the broadening contribution of the laser, α TLS describes the coupling of the Eu 3+ ion to TLS, and α TPR describes the rate of TPR interactions . The fitting gives a total value for Γ 0 + Γ l = 370 kHz, from which we deduce Γ 0 ≈ 70 kHz.…”

Emerging rare-earth doped material platforms for quantum nanophotonics

“…Optical properties were determined on samples in the form of a powder. Photon echoes, well known for providing an accurate measurement of homogeneous linewidths in transparent materials [67,68], can also be observed in powders that strongly scatter light as first demonstrated by Beaudoux et al [69] and recently theoretically analyzed [70]. Application of this technique to the above particles led to a homogeneous linewidth for Eu 3+ 7 F 0 → 5 D 0 transition at 581 nm of 86 kHz at 1.3 K [64].…”

Phosphonium-based tetrakis dibenzoylmethane Eu(iii) and Sm(iii) complexes: synthesis, crystal structure and photoluminescence properties in a weakly coordinating phosphonium ionic liquid

“…It is well known that rare earths luminescence is sensitive to the local environment and can experience a line broadening passing from an ordered state to a more disordered or dynamic system. 35 The broadening of the photoluminescence emission peaks passing from the pure complex in solid state to the complex in liquid (either in molecular solvent or ionic liquid) is thus commonly observed for rare earth complexes in solution, due to the electrostatic interactions and collisions with the surrounding molecules. The emission band at 611 nm due to the 5 D 0 / 7 F 2 transition was shied to 614 nm in the ionic liquid.…”

“…Nevertheless, as previously observed also for complex (I), transitions were broadened with respect to the solid state as typically observed in solution, due to the electrostatic interactions and collisions with the surrounding molecules. 35 The luminescence decay curves for the complex (II) in solid state, in MeCN and in ionic liquid [P 8,8,8,1 ][Tf 2 N] are shown in Fig. 12.…”