Optical absorption of in and

Abstract

The optical absorption of in (RTP) and (KTP) single crystals has been characterized at 5 K and 300 K temperatures. The room temperature oscillator strengths of obtained in both lattices are similar although in KTP the uncertainty is higher due to the lower concentration of Er in the samples available. The results obtained in RTP have been analysed by using the Judd-Ofelt theory. The effective Judd-Ofelt parameters obtained for in RTP are , , . The photoluminescence transition radiative rates, branching ratios and radiative lifetimes of in these crystals have been calculated for all de-excitations from the multiplet. The erbium emission has been characterized. The low temperature optical absorption and photoluminescence suggest the coexistence of two erbium centres in both lattices, which we have tentatively ascribed to the occupancy with different population densities of the two titanium lattice sites.

Optical Properties of Er3+ Ions in Calcium Niobium Gallium Garnet (CNGG) Crystals

“…Refs. [4,14,16,17,19,20] [22]. Therefore, it is confirmed that the observed 536 nm emission is due to the 2 H 11/2 3 4 I 15/2 transition.…”

“…The observed four green emission bands, the 545, 554, and 558 nm emission bands, are attributable to the 4 [16], and RbTiOPO 4 [17]. The 545, 554, and 558 nm emission bands show the same temporal behavior but they have a different decay curve in comparison with the 535 nm emission.…”

Electronic and structural properties of orthorhombic KTiOPO4 and related isomorphic materials

“…Four oxygen ions of the TiO 6 octahedra belonging to PO 4 tetrahedral groups link TiO 6 . Electronic excitations at the TiO 6 octahedra are thought to be responsible for the electro -optic applications [2][3][4][5][6] and in KTP a two photon absorption at 1064 nm leads to laser action of the material. The energy of this two-photon absorption is approaching the energy gap of the material that has recently been reported to lie at 3.49 -3.65 eV [7].…”

Decoherence and absorption of Er3+:KTiOPO4 (KTP) at 1.5 μm

“…Only a few studies of Er 3+ :KTP can be found in the literature [5,[21][22][23], leaving most of its spectroscopic properties, relaxation dynamics, and optical decoherence behavior unreported. In our initial study of Er 3+ :KTP transitions near 1536 nm, we found that the spectrum contained absorption lines corresponding to at least 9 crystallographically inequivalent Er 3+ sites.…”