Good Nonlinear Figures of Merit of Au/Ag2Se Core/Shell Nanostructures with Small Size |
| Xiao-Li Liua, Shuo Hana, Guang-Lan Sunb
aShandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China bBasic Science Section, North China Institute of Aerospace Engineering, Langfang 065000, China |
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| The small sized Au/Ag2Se core/shell nanoparticles are synthesized in the organic environment. This nanostructure has a good nonlinear figures of merit. The changes of the plasmon absorption peak of the samples are obtained by UV-Vis spectrophotometer. The Au/Ag2Se core/shell nanoparticles exhibit fascinating nonlinear optical properties which are studied by using Z-scan technology. The nonlinear absorption coefficient β and nonlinear refractive index γ show regular changes from Au to Au/Ag2Se core/shell nanoparticles. This also caused that their one-photon figures of merit W increase and the two-photon figures of merit T decrease. Finally, the figures of merit W=4.15 and T=0.58 of the Au/Ag2Se core/shell nanoparticles satisfy the demand of the application of all-optical switch. |
DOI:10.12693/APhysPolA.138.364 topics: nonlinear optics, Z-scan, Au/Ag2Se nanoparticles, FOM |