Photonic engineering of superbroadband near-infrared emission in nanoglass composites containing hybrid metal and dielectric nanocrystals
Photonic engineering of superbroadband near-infrared emission in nanoglass composites containing hybrid metal and dielectric nanocrystals
复制标题
含有杂化金属和介电纳米晶体的纳米玻璃复合材料中超宽带近红外发射的光子工程
DOI：
10.1364/prj.379662
复制
发表时间：
2020-05-01
影响因子：
7.6
通讯作者：
Tanaka, Katsuhisa
中科院分区：
文献类型：
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作者：
Gao, Zhigang;Zhu, Haibo;Tanaka, Katsuhisa
含有杂化贵金属-介电纳米晶体（NCs）的光子介质代表了纳米光子学的仙境，具有无数未知的光学功能有待探索。利用金属au - NCs在低硅玻璃中独特的相分离和自发形成的特性，我们制备了含有金属au / γ - ga2o3介电NCs的Ni-2掺杂透明纳米玻璃复合材料（GCs）。与不含Au-metal NCs的gc相比，在Au-metal/ γ - ga2o3双相gc中，Ni2+在280nm以上半峰全宽的超宽带近红外发射增强了2倍。比较了双相gc中Ni2+在共振泵浦和非共振泵浦条件下的自发发射（SPE）特性与金金属nc的局域表面等离子体共振带的关系。基于有限元法的理论模拟揭示了金纳米碳在固相萃取增强中的重要作用。结合Au-metal/ γ - ga2o3杂化NCs的光子工程效应和Yb3+对Ni2+的敏化效应，实现了Ni2+近红外发射的10倍以上的高增强因子，并在光纤通信波长处证明了GCs的光增益。(C) 2020中国激光出版社
Photonic media containing hybrid noble metal-dielectric nanocrystals (NCs) represent a wonderland of nanophotonics, with a myriad of uncharted optical functions yet to be explored. Capitalizing on the unique phase separation and spontaneous formation of Au-metal NCs in a gallosilicate glass, we fabricated Ni-2(+)-doped transparent nanoglass composites (GCs) containing Au-metal/gamma-Ga2O3-dielectric NCs. Compared with GCs free of Au-metal NCs, the superbroadband near-infrared emission of Ni2+ with a full width at half-maximum over 280 nm is enhanced twice in the Au-metal/gamma-Ga2O3 dual-phase GCs. A comparison is given as to the spontaneous emission (SPE) properties of Ni2+ in the dual-phase GCs when pumped resonantly and off-resonantly with the localized surface plasmon resonance band of the Au-metal NCs. The important role of the Au-metal NCs in the SPE enhancement is revealed by theoretical simulation based on the finite-element method. Combining the photonic engineering effect of hybrid Au-metal/gamma-Ga2O3 NCs and the sensitization effect of Yb3+ on Ni2+, a record-high enhancement factor of over 10 of the Ni2+ NIR emission is achieved, and optical gain is demonstrated in the GCs at the fiber communication wavelength. (C) 2020 Chinese Laser Press