Second-order susceptibility spectra for δ-BiB3O6 polymer nanocomposites deposited on the chalcogenide crystals

• Published in: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2015-07, Vol.146, p.187-191
• Main Authors: Kityk, I.V., Chrunik, M., Majchrowski, A., Guidi, Mariangela Cestelli, Angelucci, Marco, Kamel, Gihan, Fedorchuk, A.O., Pępczyńska, M., Jaroszewicz, L.R., Parasyuk, O., Bolesta, I.M., Kowerdziej, R.
• Format: Article
• Language: English
• Subjects: DFT simulations; FTIR spectra; Nonlinear optical materials; Polymer nanocomposites
• ISSN: 1386-1425
• DOI: 10.1016/j.saa.2015.02.105

Typical FTIR spectra in reflectance mode from the surface covered with the films. 1 – AgGaGe2Se6, 2 – AgGaGe2Se6, 2 – AgGaGe3Se8:Cu, 90mol.% AgGaGe3Se8/10mol.%. [Display omitted] •Complex studies of FTIR spectra for δ-BIBO nanoparticle’s embedded films deposited on chalcogenides are done.•The optimal wavelength for their photo-inducing pumping with respect to the SHG efficiency is about 2900nm.•The results are in agreement with quantum chemical calculations. The optimized conditions for the enhancement of the second harmonic generation in the composites of the orthorhombic δ-BiB3O6:Pr3+ nanoparticles embedded in polyvinyl alcohol films and deposited on the AgGaGe2Se6, AgGaGe2.7Si0.3Se8 (90mol.% AgGaGe3Se8 – 10mol.% AgGaSi3Se8), and AgGaGe3Se8:Cu substrates were established. The highest second-order susceptibility was achieved during the Ag–Ga–Ge–Se crystalline substrates photo-illumination by nanosecond laser pulses of about 2900nm wavelength. The effect was found to be completely reversible after the interruption of the photo-inducing stimulation. Complementary studies of Atomic Force Microscopy, AFM, X-ray Diffraction, XRD, and Fourier-Transform Infrared Spectroscopy, and DFT simulations of spectral dependences of the corresponding second-order nonlinear optical susceptibilities, were performed.