Optical and nonlinear optical characterization of nanostructured oxyhydroxide of aluminium

• Main Authors: Gayvoronsky, V.Ya., Kopylovsky, M.A., Vishnyakov, E.A., Khodan, A.N., Vignes, J.L., Esaulkov, M.N., Shkurinov, A.P.
• Format: Article
• Language: English
• Published: НТК «Інститут монокристалів» НАН України 2009
• Series: Functional Materials
• Subjects: Characterization and properties
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/137724

The diffusion transmittance spectra, scattering indicatrix and nonlinear optical (NLO) response within picosecond range laser pulses excitation were studied for a novel functional material - ultraporous nanostructured oxyhydroxide of aluminium (NOA). The contribution of two mechanisms of photoinduced extinction enhancement was observed at the fundamental wavelength 1064 nm of Nd:YAG laser that is similar to the NLO response of porous layers of titanium dioxide and silicon layers. The nonmonotonic behavior with photobleaching effect due to the resonance excitation of the NOA surface states was measured at the laser second harmonic wavelength. This effect can be utilized for the optical control of the states of molecules adsorbed at the NOA surface in spectroscopy and for random lasing applications.