镍离子激活超宽带近红外发光微晶玻璃研究进展  

Research Progress on Ni^(2+)-Activated Ultra-Broadband Near-Infrared Emission Glass-Ceramics

作　　者：高志刚 赵瑞 肖静[1] 崔鲁贵 王慈 钱森[3] 任晶[2] GAO Zhigang;ZHAO Rui;XIAO Jing;CUI Lugui;WANG Ci;QIAN Sen;REN Jing(School of Physics and Electronic Engineering,Taishan University,Tai'an 271021,Shandong,China;School of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]泰山学院物理与电子工程学院,山东泰安271021 [2]哈尔滨工程大学物理与光电工程学院,哈尔滨150001 [3]中国科学院高能物理研究所,北京100049

出　　处：《硅酸盐学报》2024年第5期1739-1748,共10页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(62305244、62374112);山东省自然科学基金(ZR2021QE060);山东省高等学校青年创新团队(2022KJ258)。

摘　　要：处在六配位八面体晶体场的过渡金属镍离子(Ni^(2+))具有超宽带近红外发光特性,其荧光半高宽是传统稀土离子(如Pr^(3+)、Er^(3+))的6~8倍。Ni^(2+)激活的近红外增益材料有望应用于宽带光放大器和可调谐激光器,引发了中国内外广泛关注。Ni^(2+)掺杂晶体具有极高的发光效率,但晶体存在制备工艺复杂、机械加工困难和难以成纤等问题,限制了此类材料在光纤放大器和激光器领域的应用。玻璃具有易加工和成纤的优点,但Ni^(2+)在玻璃中缺少合适的晶体场(配位场)环境,无法产生高效近红外发光。通过对玻璃进行热处理,可以在玻璃内部原位生成出不同类型的纳米晶体,即获得纳米晶体复合的微晶玻璃,可以为Ni^(2+)提供必需的晶体场。同时,控制玻璃内部生长的晶粒尺寸,使其远小于可见光波长(如小于30nm),可有效减弱瑞利散射,使微晶玻璃具有较低的光学损耗,满足光子器件实际应用要求。讨论了Ni^(2+)激活微晶玻璃的发光机理以及Ni^(2+)激活晶体、单相微晶玻璃、双相微晶玻璃和微晶玻璃光纤在超宽带近红外发光方面的研究进展,同时展望了Ni^(2+)激活超宽带近红外发光微晶玻璃未来研究的发展方向。Institute of High Energy Physics,Chinese Academy of Sciences;Transition metal nickel ions(Ni^(2+))situated in a six-coordinate octahedral crystal field exhibit a ultra-broad near-infrared(NIR)luminescence,with a fluorescence half width at half maximum(HWHM)6-8 times that of rare-earth(RE)element ions like Pr^(3+)and Er^(3+).Ni^(2+)-activated NIR gain materials can be used in broadband optical amplifiers and tunable lasers,which have attracted attention.Despite their impressive luminescent efficiency,Ni^(2+)-doped crystals have some limitations in optical fiber amplifier and laser applications due to their intricate fabrication processes,machining,and fiber formation.Glass offers some advantages in processing and fiber formation,but lacks a conducive crystal field(coordination field)environment for Ni^(2+)to achieve an efficient NIR luminescence.Various types of nanocrystals can be generated in-situ within the glass via subjecting glass to heat treatment,resulting in the formation of nanocrystalline composite glass-ceramics(GCs).Also,a precise control of grain size within the glass to dimensions smaller than the visible light wavelength(e.g.,less than 30 nm)effectively mitigates the Rayleigh scattering,endowing GCs with reduced optical losses that meet the practical demands of photonic devices.Johnson,et al.investigated the optical properties of Ni^(2+).They prepared MgF2 crystals doped with Ni^(2+)and observed fluorescence emission characteristics and optical laser oscillation phenomena under pulse xenon lamp or tungsten lamp excitation at low temperatures(i.e.,20,77 K,and 85 K).Ohishi et al.reported Ni^(2+)activated LiGa5O8 nanocrystalline GCs with a broadband fluorescence emission centered at 1.3μm with a half-width greater than 300 nm under 976 nm excitation.The lifetimes at 5 k and 300 k were greater than 900μs and 500μs,respectively,with internal and external quantum efficiencies of 100%and 9%,respectively.This emission was attributed to the transition of Ni^(2+)from^(3)_T(2g)(^(3)F)→^(3)A_(2g)(^(3)F)le

关 键 词：过渡金属离子 微晶玻璃 宽带发光 光纤放大器 近红外光源 

分 类 号：TB332[一般工业技术—材料科学与工程]