title: [The interior relation between FDP and SHG].
abstract: The fluorescence-disappearing phenomenon (FDP) was used due to the nonlinear interaction between the laser and the matter, a universal phenomenon. It was often neglected during the research of surface-harmonic generation (SHG). Many experiments showed that there was a interior relation between FDP and SHG. In this paper, the mechanism of surface-harmonic generation has been discussed in detail, according to the fluorescence-disappear viewpoint and the fluorescence-disappear model (FDM) proposed also. The new mechanism was summarized by following three points: (a) The multiphoton absorption generated visible fluorescence spot, (b) Laser-heating effect and other effects promoted the conversion from spontaneous emission into quasi-stimulated emission, (c) Being accompanied by the fluorescence disappear, the part of laser energy which was initially used to cause fluorescence was now converted into developing the harmonic signal.
authors.affiliation: Department of Physics, Shaanxi Normal University, Xi'an.
authors.forename: X
authors.initials: X
authors.lastname: Li
authors.forename: M
authors.initials: M
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Huan
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: K
authors.initials: K
authors.lastname: Fu