Effect Of Pulse Width On Nonlinear Optical Properties Of Zinc Oxide Nanomaterials

With the development of laser technology, the pulsed lasers’ application becomes wider and wider. Ultra-short pulse width has a peak intensity and high time resolution, so it is applied in the study of nonlinear optical properties of many materials, and the study of nonlinear optical properties of nano-materials have great value. In recent years, with the development of semiconductor materials, ZnO has become a hot research field of semiconductor material, its band gap energy is 3.36 eV, the laser beam energy is 60meV, its structure is hexagonal crystal structure, is 6mm point group, the lattice constants:a= 0.325nm, c= 0.521nm. Such that the crystal structure of ZnO makes itself has a strong surface effect. Except that, ZnO crystal has high electric conductivity and high transmittance, its transmission is reliable. Therefore ZnO crystal can be applied in the field of short wavelength light emitting device, a transparent conductive electrode, and a piezoelectric sensor by great concern.In this paper, we used ultra-short pulse laser to research the nonlinear properties of ZnO nano-particles and ZnO single crystal materials. Firstly the research methods and achievements of ZnO nano optical nonlinear of the domestic and abroad in recent years have been analyzed. We detailed the ZnO single crystal structure characteristics, and analyzed the ultra short pulse laser and Z-scan technology. Then, according to the nonlinear optical absorption and refraction model of ZnO in the ns and ps pulsed laser excitation, measured and analyzed the nonlinear absorption and refractive index of ZnO nano-materials, which summarized the nonlinear optical property of ZnO nano material. Finally, the research work carried out in this paper summarizes and future work prospects.