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 separat...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/γ-Ga2O3-dielectric NCs.Compared with GCs free of Au-metal NCs,the super broadband near-infrared emission of Ni^2+with a full width at half-maximum over280 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 Ni^2+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 Yb^3+on Ni^2+,a record-high enhancement factor of over 10 of the Ni^2+NIR emission is achieved,and optical gain is demonstrated in the GCs at the fiber communication wavelength.展开更多
基金National Natural Science Foundation of China(11774188,51872055,61635007,61925501)National Key Research and Development Program of China(2016YFF0200704)+5 种基金Natural Science Foundation of Heilongjiang Province(F2017006)Fundamental Research Funds for the Central UniversitiesOpen Fund of the Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques(South China University of Technology)Ph D Student Research and Innovation Fund of the Fundamental Research Funds for the Central Universities(HEUGIP201819)111 Project to the Harbin Engineering University(B13015)Incubation Program of Universities’Preponderant Discipline of Shandong Province(03010304)。
文摘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/γ-Ga2O3-dielectric NCs.Compared with GCs free of Au-metal NCs,the super broadband near-infrared emission of Ni^2+with a full width at half-maximum over280 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 Ni^2+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 Yb^3+on Ni^2+,a record-high enhancement factor of over 10 of the Ni^2+NIR emission is achieved,and optical gain is demonstrated in the GCs at the fiber communication wavelength.
