Rare earth ions doped oxyfluoride glass with composition of 28SiO2·22AlO1.5·40PbF2·10PbO·（4.8-x） GdFy0.1NdF3.xYbF3·0.1TmF3 （x=-0, 0.1, 0.2, 0.5, 1, 2, 3, 4 and 4.8） in molar ratio was deve...Rare earth ions doped oxyfluoride glass with composition of 28SiO2·22AlO1.5·40PbF2·10PbO·（4.8-x） GdFy0.1NdF3.xYbF3·0.1TmF3 （x=-0, 0.1, 0.2, 0.5, 1, 2, 3, 4 and 4.8） in molar ratio was developed. When the oxyfluoride glasses were heat-treated at the first crystallization temperature, the glasses gave transparent glass-ceramics in which rare earth containing fluorite-type nanocrystals of about 17.2 nm in diameter uniformly precipitated in the glass matrix. Compared with the glasses before heat treatment, the glass-ceramics exhibited very strong blue up-conversion luminescence under 800 nm light excitation. Rare earth containing nanocrystals were also space selectively precipitated upon laser irradiation in an oxyfluoride glass, the size of precipitated nanocrystals could be controlled by laser power and scan speed. The intensity of the blue up-conversion luminescence was strongly dependent on the precipitation of β-PbF2 nanocrystal and the YbF3 concentration. The reasons for the highly efficient Tm^3＋ up-conversion luminescence after laser irradiation were discussed.展开更多
Optical data storage technology has many advantages over the traditional solid-state and magnetic storage technology,such as low cost,multi-dimensional storage,and rewritable capability.Therefore,the optical data stor...Optical data storage technology has many advantages over the traditional solid-state and magnetic storage technology,such as low cost,multi-dimensional storage,and rewritable capability.Therefore,the optical data storage technology has been in increasing demand for optical storage media.Herein,the photochromic and photoluminescence properties of BaMgSiO4:Bi^3+ceramics were investigated.The BaMgSiO4:Bi^3+ceramics showed reversible photochromism from gray to pink upon alternating the 254 nm ultraviolet light and 532 nm laser irradiation.This is caused by the electron trapping and de-trapping in the oxygen vacancies of the BaMgSiO4:Bi^3+host.This reversible behavior of photochromism was applied to fabricate different patterns on the surface of the BaMgSiO4:Bi^3+ceramics,which exhibited the reversible dual-mode optical information recording and erasing abilities.The photoluminescence reversible modulation of the BaMgSiO4:Bi^3+ceramics was obtained through the photochromic phenomenon.This modification behavior of luminescence could be applied to read-out the recording information in the BaMgSiO4:Bi^3+ceramics.The coloration and bleaching of BaMgSiO4:Bi^3+ceramics were dependent on the time of light stimulation,which facilitated multiplexing encoding.This photoluminescence and photochromism multiplexing of the BaMgSiO4:Bi^3+ceramics enhanced the optical data storage capability.展开更多
基金supported by the National Natural Science Foundation of China (50572029) Natural Science Foundation Project of Yunnan Province (2007E036M)
文摘Rare earth ions doped oxyfluoride glass with composition of 28SiO2·22AlO1.5·40PbF2·10PbO·（4.8-x） GdFy0.1NdF3.xYbF3·0.1TmF3 （x=-0, 0.1, 0.2, 0.5, 1, 2, 3, 4 and 4.8） in molar ratio was developed. When the oxyfluoride glasses were heat-treated at the first crystallization temperature, the glasses gave transparent glass-ceramics in which rare earth containing fluorite-type nanocrystals of about 17.2 nm in diameter uniformly precipitated in the glass matrix. Compared with the glasses before heat treatment, the glass-ceramics exhibited very strong blue up-conversion luminescence under 800 nm light excitation. Rare earth containing nanocrystals were also space selectively precipitated upon laser irradiation in an oxyfluoride glass, the size of precipitated nanocrystals could be controlled by laser power and scan speed. The intensity of the blue up-conversion luminescence was strongly dependent on the precipitation of β-PbF2 nanocrystal and the YbF3 concentration. The reasons for the highly efficient Tm^3＋ up-conversion luminescence after laser irradiation were discussed.
基金supported by the National Natural Science Foundation of China (51762029, 11674137)the Applied Basic Research Key Program of Yunnan Province (2018FA026)
文摘Optical data storage technology has many advantages over the traditional solid-state and magnetic storage technology,such as low cost,multi-dimensional storage,and rewritable capability.Therefore,the optical data storage technology has been in increasing demand for optical storage media.Herein,the photochromic and photoluminescence properties of BaMgSiO4:Bi^3+ceramics were investigated.The BaMgSiO4:Bi^3+ceramics showed reversible photochromism from gray to pink upon alternating the 254 nm ultraviolet light and 532 nm laser irradiation.This is caused by the electron trapping and de-trapping in the oxygen vacancies of the BaMgSiO4:Bi^3+host.This reversible behavior of photochromism was applied to fabricate different patterns on the surface of the BaMgSiO4:Bi^3+ceramics,which exhibited the reversible dual-mode optical information recording and erasing abilities.The photoluminescence reversible modulation of the BaMgSiO4:Bi^3+ceramics was obtained through the photochromic phenomenon.This modification behavior of luminescence could be applied to read-out the recording information in the BaMgSiO4:Bi^3+ceramics.The coloration and bleaching of BaMgSiO4:Bi^3+ceramics were dependent on the time of light stimulation,which facilitated multiplexing encoding.This photoluminescence and photochromism multiplexing of the BaMgSiO4:Bi^3+ceramics enhanced the optical data storage capability.
基金supported by the National Natural Science Foundation of China (51762029 and 12204206)Yunnan Fundamental Research Project (202101BE070001-043 and 202201AU070119)+3 种基金the National Natural Science Foundation of High-end Foreign Experts Introduction Plan (G2022039008L)the Academician Workstation of Cherkasova Tatiana in Yunnan Province (202305AF150099)Yunnan Province Major Science and Technology Special Plan (202302AB080005)Chuoli Chengcai Training Program of KUST Faculty of Materials Science and Engineering (CLXYCLCC2023070)
