title: Second-harmonic generation in graded metallic films.
abstract: We study the effective second-harmonic generation (SHG) susceptibility in graded metallic films by invoking the local field effects exactly and further numerically demonstrate that graded metallic films can serve as a novel optical material for producing a broad structure in both the linear and the SHG response and an enhancement in the SHG signal.
authors.affiliation: Department of Physics, The Chinese University of Hong Kong, Shatin, NT, Hong Kong. jphuang@mpip-mainz.mpg.de
authors.forename: J P
authors.initials: JP
authors.lastname: Huang
authors.forename: K W
authors.initials: KW
authors.lastname: Yu