High-resolution laser induced excitation spectroscopy and decay dynamics of YNbO:Er.

The rare earth materials have attracted intensive attention due to their strong luminescent characteristic. However, the split fine Stark levels are difficult to be determined. Here we report a room-temperature detection for Stark levels of YNbO: Er using established laser-induced spectroscopy system with dye laser of superhigh resolution of wavelength at 0.005 nm. From excitation spectra, six split Stark levels of G (Er) were directly detected. Moreover, nonradiative relaxations of G→G and G→H/ S have been observed with weighed lifetimes of 0.70 μs and 6.15 μs, and characteristic green emission of Er (@555 nm) yields lifetime of 31.78 μs.