| Rare earth element could easily lose the electron in4f electronic shell forming the very rich energy levels, which activity is after alkali metals and alkaline earth metals is the typical metal element. While the4f electronic shell is less affected by the outside environment, with the shielding effect of the outer5s2and5p6electronic shells, lead to its optical properties are complex and difficult to study. Whereas, with the development of science and technology multiple doping of rare earth increased largely and applied widely, the luminescence properties of rare earth ions and its energy level structures cannot effectively resolved by conventional methods. In this paper, in order to study the optical properties of rare earth ions with some extreme circumstances and to feed the needs, the relevant experimental platform is set up, and some meaningful phenomena are found and explained credibly. The main contents are as follows:First, the development, present situation, and research prospects of rare earth are introduced briefly. The status of rare earth and the background are elaborated with the present situation and application value also the advances of researches and achievements from domestic and foreign, respectively. The existing technology and method used to measure the structure and optical properties of rare earth ions are analyzed, and the prospects of extremely low temperature and strong magnetic field are also discussed.Second, the magneto-optical experimental station is introduced detailed, which is set up to realize the magneto-photoluminescence/absorption and related experiments, while the design and build of the experimental platform and related experimental facilities are based on the national pulse magnetic field experiment center. The realization of optical experiments and experimental operation and other related works under pulsed high magnetic field are introduced. In addition the practical operation and safety handbook are formed according to our exploration.Third, the preparations and pre-measures of Er doped samples are introduced. The structure of Er3+doped YVO4and GdVO4single crystals, according to the results of the measurement, prepared by optical floating zone method, are belong to tetragonal crystal system indicate that Er3+ions have been successfully doped into the crystals. And also the Er3+doped YVO4nano-crystal, prepared by the method of chemical synthesis, is regulatory crystallized in sizes and particles. These results show that the samples have been successfully prepared for pulse field experiments.Fourth, the absorption and luminescence properties of Er3+doped YVO4and GdVO4single crystals are studied though some conventional methods. One can realize that the lattice environments of rare earth ions are different by comparing the luminescence spectra of Er3+ions in YVO4and GdVO4single crystal also the YVO4nano-crystalline, such as the absorption and luminescence peak position also intensity. The temperature dependent photoluminescence experiments of Er3+doped YVO4and GdVO4crystals show that temperature can also effect on its emissions. Some factors that influence the properties of luminescence are studied, which are the preliminary testing and exploring of the luminescence properties of rear earth under pulsed high magnetic field.Fifth, the reliability and practicability of the facility for magneto-optical experiments under extreme conditions with low temperature and pulsed high magnetic field are tested and verified. The related optical properties of Er3+doped crystals are measured show that the rare-earth luminescence intensity is greatly depend on the excitation wavelength and temperature also magnetic field even some other factors. We come to the conclude that the variation of Er3+doped samples luminescence properties are, affected by magnetic field and temperature and so on, mainly originated from the change of the absorption. This points out that the related information of rare earth, such as the details of energy levels, can be measured by changing the excitation wavelength or full width at half maximum of exciting light and detecting the photoluminescence intensity under magnetic field. Thus, a direct and effective method to study the energy levels and structures of rare earth ions is given. According to the analysis and exploration, the control of these parameters artificially to modulate the luminous intensity and colors of samples are available. It can be further development in the future and also have the opportunity to produce practical functions materials, such as magneto-optical detector and so on. |
