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- Title
Good Nonlinear Figures of Merit of Au/Ag<sub>2</sub>Se Core/Shell Nanostructures with Small Size.
- Authors
XIAO-LI LIU; SHUO HAN; GUANG-LAN SUN
- Abstract
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.
- Subjects
NANOPARTICLES; PAY for performance; ABSORPTION coefficients; REFRACTIVE index; NANOSTRUCTURES; OPTICAL switches; NONLINEAR optical spectroscopy
- Publication
Acta Physica Polonica: A, 2020, Vol 138, Issue 3, p364
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.138.364