Pressure dependence of the 4f ¹ 5d ¹ → 4f ² emission of Pr ³⁺ :YAG using excited state absorption

Abstract

1 state and the electron-lattice coupling.

High pressure spectroscopy of rare earth ions doped crystals—new results

“…Following this assumption quantity dDE dp should be calculated from the pressure shift of the absorption spectra. Unfortunately we have only two cases where the pressure dependence of the absorption were detected (GSAG: Ce 3+ [26] and Al 2 O 3 :Ti 3+ [14]). In other cases we have used pressure shift of the emission instead of the shift of absorption spectra, to calculate dDE dp .…”

“…In this contribution the latest investigations on high pressure spectroscopy of Ce 3+ and Pr 3+ ions in various lattices [24,25,21,26] are summarized. Additionally the spectroscopic data obtained for d-f transitions in rare earth ions are compared with the luminescence results obtained by high pressure spectroscopy for d-d transitions in transition metal ions in solids.…”

Pressure dependence of the 3P0→3H4 and 1D2→3H4 emission in Pr3+:YAG

“…The 3 P 0 -3 H 4 emission consists of two peaks whose energies also diminish with pressure with different rates. Since the pressures at which the level crossings occur are similar for emission from both 1 D 2 and 3 P 0 and because 3 P 0 is non-degenerate, the energy crossing must occur between the G 3 , G 1 and G 4 components of the 3 …”

“…Pr 3+ -doped Y 3 Al 2 O 12 (YAG) yields effective emission in the range from the UV to IR resulting from radiative transitions from the 3 P 1 , 3 P 0 , 1 D 2 and 1 G 4 states belonging to the 4f 2 electronic configuration [1], and the lowest state of 4f 1 5d 1 excited electronic configuration [2,3]. The effect of pressure was used to study the energy level structure of Pr 3+ ions and modify these resonance energies for studies of up-conversion and energy transfer since pressure will alter the crystal field.…”

Mixing of the f2(1S0) and 4f5d states of Pr3+ in BaSO4 under high pressure

“…This is in contrast to the expectation that the 5d states of rare earth ions generally decrease in energy with pressure as the compression increases the crystalline field. Based on emission in YAG, the lowest 5d levels of Pr 3+ and Ce 3+ have been found to decrease at rates of 14.1 [7] and 12.5 cm À1 kbar À1 [8], respectively.…”