Temperature effects on the 1.0 and 1.3 μm emission lines of Nd3+ in a LaSc3(BO3)4 crystal host

Abstract

A detailed investigation of the temperature effect on widths and shifts of the spectral lines of Nd3+ in LaSc3(BO3)4 has been performed. The spectral lines investigated correspond to the inter-Stark transitions R1→Y3 (1062 nm) and R1→Z4 (1344 nm) within the F3/24→4I11/2 and F3/24→4I13/2 intermanifold transitions, respectively. The widths of these lines and their shifts have been measured as a function of temperature. The linewidths are found to increase with increasing temperature for both transitions; the 1062 nm line shifts to the longer wavelengths, whereas the 1344 nm line shifts to the shorter wavelengths. The theory of phonon-ion interactions has been employed to explain the temperature dependencies of widths and shifts. These interactions give rise to the phonon relaxation processes that are responsible for both the broadening and shifts of the spectral lines.

Research on the thermal shifts and electron–phonon coupling parameters of Ri lines for Cr3+ ions in LaGaO3 and LaAlO3 crystals

“…However, differing from Eq. (1) which can explain only the red-shift of spectral lines [22,23], Eq. (2) can explain (or fit) consistently the red-shift, almost no-shift and blue-shift for the spectral lines of d n and 4f n ions in crystals [21,[24][25][26][27][28] because it contains the competition between the vibrational and static contributions to the thermal shifts.…”