Superposed picosecond luminescence kinetics in lithium niobate revealed by means of broadband fs-fluorescence upconversion spectroscopy.

ABSTRACT: Various manifestations of small polarons strongly affect the linear and nonlinear optical properties of the oxide crystal lithium niobate ([Formula: see text], LN). While related transient absorption phenomena in LN have been extensively studied in recent decades, a sound microscopic picture describing the blue-green (photo)luminescence of lithium niobate single crystals is still missing. In particular, almost nothing is known about: (i) the luminescence build-up and (ii) its room temperature decay. We present here the results of our systematic experimental study using nominally undoped and Mg-doped LN crystals with different Mg concentration. Picosecond luminescence was detected by means of femtosecond fluorescence upconversion spectroscopy (FLUPS) extended to the inspection of oxide crys

SUBMITTER: Krampf A 

PROVIDER: S-EPMC7347870 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature