Enhanced one- and two-photon pumped amplified spontaneous emissions of Ag-SiO2 core-shell nanowire composite embedded CH3NH3PbBr3 in SiO2 mesopores

Benefiting from high-performance of photoelectric, hybrid organic-inorganic perovskite shows great development potential. We introduce a composite nanostructure of monolayer well-organized mesoporous silica, with a wrapped silver nanowire as a core. A gain material, methyl ammonium lead bromide (MAPbBr3) was embedded in mesoporous silica (mSiO2). Using 400-nm and 800-nm femtosecond lasers for pumping, which were corresponding to one-photon and two-photon regimes, the laser sign peaks appeared at 549 nm and 546 nm. The amplified spontaneous emissions (ASE) were observed, as well, giant enhancements of ASE can be obtained due to the localized field of surface plasmon resonance caused by silver-core. Compared with composites without silver nanowire cores to enhance the field distribution, the thresholds are significantly down to ∼62% and 32% of original values under 400-nm and 800-nm femtosecond lasers pump, respectively.