ISSN:
1432-0630
Keywords:
78.65.Ez
;
42.65.Cq
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract In metal-island films consisting of nanometer particles on a transparent substrate irradiated light fields can be locally enhanced by electron-plasma resonances. Therefore, nonlinear optical processes should be enhanced dramatically. However, second-order nonlinear processes as second-harmonic generation occuring in the surface are strongly reduced by the centrosymmetric shape of the metal particles. It is found that this surface-specific contribution to second-harmonic generation is less enhanced, as is expected from the field enhancement. The “bulk” contribution, at smooth metal surfaces known to be much weaker than the contribution from the “real surface”, is strongly enhanced by the plasma resonances without symmetry restrictions and becomes comparably important.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01538232
