Nonlinear optical properties and morphologies of VOPc thin film prepared on polyimide film

If the third harmonic phase matching condition of a nonlinear optical material is satisfied, the efficiency of third harmonic wave is improved, and the TH strength increases in proportion to the square of the film thickness. The phase matching condition was examined from the relation of the TH strength vs. the film thickness. The UV/VIS spectra of the film is studied.