Picosecond excite-and-probe absorption measurement of nonradiative transition dynamics in emerald |
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| Institution: | 1. Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, Guizhou, China;2. School of Electronics and Information Engineering, Guiyang University, Guiyang, China;1. College of Rare Earths, Jiangxi University of Science and Technology, Ganzhou 341000, PR China;2. Key Laboratory of Rare Earth Luminescence Materials and Devices of Jiangxi Province, Jiangxi University of Science and Technology, Ganzhou 341000, PR China;3. Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation, Jiangxi University of Science and Technology, Ganzhou 341000, PR China;4. National Rare Earth Functional Materials Manufacturing Innovation Centre, Ganzhou 341000, PR China |
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| Abstract: | The nonradiative transition dynamics between the excited 4T2 state and the metastable 2E storage state of the trivalent chromium ion in emerald is investigated using the picosecond excite-and-probe absorption technique. An intra-4T2 state vibrational relaxation time of 23 ps, and a 4T2→2E electronic relaxation time of 20 ps are obtained. The thermal repopulation rate of the 4T2 state from the metastable 2E level is ~9.0×109 s-1. |
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