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Nonlinear optical properties of Au@Ag coreshell nanospheres excited by femtosecond laser
- Source :
- AIP Advances, Vol 11, Iss 11, Pp 115109-115109-5 (2021)
- Publication Year :
- 2021
- Publisher :
- AIP Publishing LLC, 2021.
-
Abstract
- The nonlinear optical properties and ultrafast dynamics process of Au@Ag coreshell nanospheres (NSs) are reported in this paper. We researched the optical nonlinear absorption property of Au@Ag coreshell NSs excited by 800 nm laser at different energies by open-aperture Z-scan technology. The experimental results demonstrated that the Au@Ag coreshell NSs exhibited two-phone absorption (TPA) behavior, the degree of which was intensity-dependent. The TPA coefficients of Au@Ag coreshell NSs excited by different energies were obtained by fitting. By using pump-probe technology, we studied the ultrafast dynamics process of Au@Ag coreshell NSs. The results indicated that the relaxation process contained a fast and a slow process, which depended strongly on the laser intensity. By numerical fitting, we got the relaxation times of the sample excited at different laser powers.
Details
- Language :
- English
- ISSN :
- 21583226
- Volume :
- 11
- Issue :
- 11
- Database :
- Directory of Open Access Journals
- Journal :
- AIP Advances
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.267b5d32b10f4cef9db8f9881be36105
- Document Type :
- article
- Full Text :
- https://doi.org/10.1063/5.0067588