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. We present the results of the photoluminescence of the crystals doped with transition metals or rare earth ions obtained under high hydrostatic pressure up to 300 kbar applied in diamond anvil cells (DAC). We have focused on Al2O3, YAlO3 LLGG and YAG garnets and LiNbO3, and LiTaO3 perovskites doped with Cr3+, Ti3+ and Ce3+. We have observed the pressure induced red shift of the d→f emission in the case of materials doped with Ce and blue shift of the T2→A2 and E→T2 emission in the case of materials doped with Cr3+ and Ti3+, respectively. Considering our experimental data we have calculated the local compresibilities of the materials and found that almost in all cases this quantity is smaller than compressibility of the bulk.

semiconductor physics, quantum electronics and optoelectronics/semiconductor physics quantum electronics and optoelectronics

Influence of high hydrostatic pressure on energetic structure and electron-lattice coupling of transition metal and rare earth related centers in solids