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Investigation of Radiative and Nonradiative Relaxation by Two-Photon Resonant Excitation in Tm3+ Doped LaF3 Particles

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Nano-scaled and micro-scaled Tm3+-doped LaF3 were prepared by a hydrothermal technique. Two-photon resonant excitation from the ground state 3H6 to the excited state 1D2 was fulfilled by two pulsed dye lasers tuned at 656 nm and 643 nm, respectively, which were resonant with the ground state absorption of 3H63F2 and the excited state absorption of 3H41D2. The time evolution of the corresponding state was investigated with blue upconverted emission by tuning the delay of two excitation lights. The results showed that the nonradiative relaxation of the 3F2 state was mainly affected by the confinement effect, while the radiative relaxation of 3H4 state was significantly influenced by the Tm3+ concentration.
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Document Type: Research Article

Publication date: 2010-03-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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