Study of Second Harmonic Generation in KDP/Al2O3 Crystalline Nanocomposite
N. Andrushchak a, B. Kulykb, P. Göring c, A. Andrushchak a and B. Sahraoui d
aLviv National Polytechnic University, 12 S. Bandery Str., 79013 Lviv, Ukraine
bResearch and Educational Center "Fractal", Department of Physics, Ivan Franko National University of Lviv, 50 Dragomanova Str., 79005 Lviv, Ukraine
cSmartMembranes GmbH, Heinrich-Damerow-Str. 4, 06120 Halle, Germany
dUniversity of Angers, MOLTECH-Anjou Laboratory, UMR CNRS 6200, 2 bd Lavoisier, 49045 Angers, France
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Crystalline nanocomposite KDP/Al2O3 was obtained by growth of KDP nanocrystals inside nanopores of amorphous alumina matrix (Al2O3) with pores diameter of 35 nm. Performed atomic force microscopy and X-ray diffraction analysis confirmed that Al2O3 matrix is filled up with a tetragonal phase KDP nanocrystals in preferred crystallographic orientation [100]. The nonlinear optical response was studied by means of second harmonic generation via the Maker fringe technique employing picosecond laser pulses at wavelength of 1064 nm. The polarization dependent second harmonic generation response was observed mainly due to the macroscopic crystalline structure anisotropy of KDP/Al2O3 nanocomposite. The investigation of such type of nanocomposites which combine nanoscale nonlinear optical materials has a great importance since they may improve the performance of entire system.

DOI: 10.12693/APhysPolA.133.816
PACS numbers: 81.07.Bc, 61.46.Df, 68.37.Ps, 42.65.Ky