THEORY OF NONLINEAR-OPTICAL PROPERTIES OF SMALL METALLIC SPHERES

Citation
D. Ostling et al., THEORY OF NONLINEAR-OPTICAL PROPERTIES OF SMALL METALLIC SPHERES, Zeitschrift fur Physik. D, Atoms, molecules and clusters, 28(2), 1993, pp. 169-175
Citations number
15
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
ISSN journal
01787683
Volume
28
Issue
2
Year of publication
1993
Pages
169 - 175
Database
ISI
SICI code
0178-7683(1993)28:2<169:TONPOS>2.0.ZU;2-O
Abstract
We calculate the nonlinear optical properties of small metallic sphere s using electromagnetic theory and assuming that the local response of the conduction electrons is the same as for a plane surface. Electrom agnetic Mie-resonances cause a strong increase of the second and highe r harmonics in the reflected light. Detailed results are given for the second and third harmonic generation, its dependence on the frequency and polarization of the incident light, and on the cluster size. An e nhancement of the second harmonic generation by a factor of about 5000 is obtained for small spherical metallic clusters. This is in good ag reement with experiments on artificially roughened metal surfaces.