H~gb-resolution CARS spectra of molecular mdme were recorded wtb euc~tahon frequenaes in resonance wth the absorphon contmuum of the B(3nO+u) and the re ulswe \* ITl, state. Band-shapes are euplamed by a cakulahon of the thud-order non-bnear susceptibthty for CARS x (3P (WAS)\_ Tberc is scnuquantito
Experimental observation of surface-enhanced coherent anti-Stokes Raman scattering
β Scribed by E.J. Liang; A. Weippert; J.-M. Funk; A. Materny; W. Kiefer
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 458 KB
- Volume
- 227
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Surface-enhanced coherent anti-Stokes Raman scattering has been observed on colloidal silver surface from benzene, the mixture of benzene and N,Ndimethylformamide, toluene, and chlorobenzene. Silver colloids which were prepared in organic solvent N,N-dimethylformamide were used as an enhancement medium. The scattered CARS light was collected at right angles with respect to the exciting pump and Stokes laser beams. It was found that not only is the CARS signal significantly enhanced but the signal-to-noise ratio is also improved after addition of the silver sol. An excitation profile study shows a maximum enhancement for the benzene-silver sol system located at about 500 nm pump laser wavelength. This is in good accord with the surface plasmon resonance of the system.
π SIMILAR VOLUMES
The potential of coherent anti-Stokes Raman scattering (CARS) as a local probe for nanocomposite materials is theoretically analyzed. In view of the interference nature of CARS spectra and the high spatial resolution, CARS is argued to be ideally suited for the metrology of nanostructures and nanoco