Photonics Research, 2020, 8 (5): 05000698, Published Online: Apr. 23, 2020   

Photonic engineering of superbroadband near-infrared emission in nanoglass composites containing hybrid metal and dielectric nanocrystals Download: 606次

Author Affiliations
1 Key Laboratory of In-fiber Integrated Optics, Ministry of Education, Harbin Engineering University, Harbin 150001, China
2 Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
3 Center of Analysis and Measurement, Harbin Institute of Technology, Harbin 150001, China
4 School of Information Engineering, Guangdong University of Technology, Guangzhou 510008, China
5 Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province, School of Materials Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
6 e-mail: ren.jing@hrbeu.edu.cn
7 e-mail: zhangjianzhong@hrbeu.edu.cn
8 e-mail: yangj@gdut.edu.cn
Abstract
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 Ni2+-doped transparent nanoglass composites (GCs) containing Au-metal/γ-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/γ-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/γ-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.

Zhigang Gao, Haibo Zhu, Bochao Sun, Yingke Ji, Xiaosong Lu, Hao Tian, Jing Ren, Shu Guo, Jianzhong Zhang, Jun Yang, Xiangeng Meng, Katsuhisa Tanaka. Photonic engineering of superbroadband near-infrared emission in nanoglass composites containing hybrid metal and dielectric nanocrystals[J]. Photonics Research, 2020, 8(5): 05000698.

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