The use and applications of infrared emitting rare-earth luminescent nanoparticles as nanothermometers have attracted a great deal of attention during the last few years.
Holographic recording in Bi 12 TiO 20 crystal at 1064 nm is investigated aiming the characterization of diffraction efficiency under action of applied dc electric field (E 0 ). An enhancement of 12-fold in the diffraction efficiency was revealed when E 0 increased from 0.0 to 4.2 kV/cm. The theoretical dependence of the diffraction efficiency upon E 0 was investigated using the standard model for photorefractivity and the results showed a good experimental data fitting, allowing the computation of the acceptor concentration in the crystal of ≈ 5.3 × 10 15 cm −3 .
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