Photothermally Induced Bistability of Emission of Yb-doped Ca4NdO(BO3)3 Single Crystals |
| |
| Authors: | M ?wirkowicz A K?os T ?ukasiewicz A Majchrowski I V Kityk |
| |
| Institution: | 1. Institute of Electronic Materials Technology , Warsaw, Poland;2. Institute of Applied Physics, Military University of Technology , Warsaw, Poland;3. Electrical Engineering Department , Technological University of Czestochowa , Czestochowa, Poland |
| |
| Abstract: | We report on studies of changes in the emission spectra (excited at 808 nm) of the Yb-doped Ca4NdO(BO3)3 single crystals due to the photothermal effects caused by the pulsed Nd:YAG laser. Increase of the sample's surface temperature after laser treatment leads to significant enhancement of the 1040 to 1060 nm emission (ascribed to the Nd3+ 4F3/2 → 4I9/2, 4I11/2 transitions) and simultaneous decrease of the 975 to 1050 nm emission (corresponding to the Yb3+ 2F5/2 → 2F7/2 transition). We explain such an increase of the Nd3+ luminescence by thermally activated Yb3+ → Nd3+ energy transfer. |
| |
| Keywords: | Yb–doped crystals photothermal effects energy transfer |
|
|
