Picosecond excite-and-probe absorption measurement of the intra-2E g E3/2-state vibrational relaxation time in Ti3+:Al2O3

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Abstract
The kinetics of vibrational transitions in the 2EgE3/2 electronic state of Ti3+:Al2O3 is studied by exciting higher lying vibrational levels of the state by a 527‐nm picosecond pump pulse, and monitoring the subsequent growth of population in the zero vibrational level and lower lying vibrational levels by a 3.9‐μm picosecond probe pulse. An upper limit of 3.5 ps for intra‐2EgE3/2 ‐state vibrational relaxation time is estimated.