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Femtosecond Third-Order Optical Nonlinearity of Au:Bi2O3 Nanocomposite Films.
- Source :
-
Chinese Physics Letters . Mar2007, Vol. 24 Issue 3, p730-733. 4p. - Publication Year :
- 2007
-
Abstract
- Ultrafast third-order optical nonlinearities of the as-deposited and annealed Au:Bi2O3 nanocomposite films deposited by magnetron cosputtering are investigated by using femtosecond time-resolved optical Kerr effect (OKE) and pump-probe techniques. The third-order optical nonlinear susceptibility is estimated to be 2.6x10[?]10 esu and 1.8x10[?]9 esu at wavelength of 800 nm, for the as-deposited and the annealed film, respectively. The OKE signal of the as-deposited film is nearly temporally symmetrical with a peak centred at zero delay time, which indicates the dominant contribution from intraband transition of conduction electrons. For the annealed film, the existence of a decay process in OKE signal implies the important contribution of hot electrons. These characteristics are in agreement with the hot electron dynamics observed in pump-probe measurement. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0256307X
- Volume :
- 24
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Chinese Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 60337152
- Full Text :
- https://doi.org/10.1088/0256-307X/24/3/039