Second-harmonic efficiency of ZnO nanolayers

Neumann, Uwe; Grunwald, Ruediger; Griebner, Uwe; Steinmeyer, Günter; Seeber, Wolfgang
January 2004
Applied Physics Letters;1/12/2004, Vol. 84 Issue 2, p170
Academic Journal
Pure and doped nanocrystalline ZnO films of 0.1–1.0 μm thickness were prepared by spray pyrolysis techniques. Structural properties of these thin films were investigated by electron microscopy, force microscopy, x-ray diffractometry, ellipsometry, and optical spectroscopy. Using Ti:sapphire laser pulses, the second-harmonic efficiency of the films was measured. A correlation between measured efficiency and the grain shape in the polycrystalline layers is reported. Moreover, measurements of the angular dependence of the second-harmonic intensity are indicative of the dominant role of bulk effects over surface effects for the second-harmonic generation in such films. © 2004 American Institute of Physics.


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