Optical and structural characterization of thin films containing metallophthalocyanine chlorides

Abstract

International audience<p>The structural and optical investigation of thin films containing aluminum and gallium phthalocyanine chlorides is presented. The films were fabricated by Physical Vapor Deposition technique onto quartz substrates and annealed after fabrication in an ambient atmosphere for 24&nbsp;h at the temperature equal to 150&nbsp;°C or 250&nbsp;°C. The experimental results and theoretical calculation of the Third Harmonic Generation process are reported. The third order nonlinear optical properties are expected and can be more or less accurately predicted due to the assembly of the molecules and theoretical calculations of the frequency-dependent dipole polarizabilities, third hyperpolarizabilities, third order susceptibilities, frontier and second frontier molecular orbitals. These parameters were used to understand the relationship of optical properties with the molecular structures. We found that the annealing process causes formation of nanostructures and the value of the third order optical susceptibility makes these materials interesting for future nonlinear optical applications.</p

Linear and nonlinear optical properties of ZnO thin films deposited by pulsed laser deposition

“…A few theoretical models, using various approximations, have been described in order to determine the value of χ <3> elec from the shape of the experimental curves obtained by the THG technique [30][31][32][33][34]. We used two selected models: Comparative and Reintjes, for results explanation.…”

“…This model compares [30][31][32][33] directly the maximum of light intensities amplitudes for third harmonic of the nonlinear sample with those of the reference material used for a calibration of the experimental setup. The value of the third order nonlinear susceptibility χ <3> elec is derived by comparing third harmonic peak intensities of the sample and reference material (fused silica glass in this experiment).…”

Optical properties of MgO thin films grown by laser ablation technique

“…A few theoretical models, using various approximations, have been described in order to determine the value of v elec 3 from the shape of the experimental curves of Maker fringes (Maker et al 1962;Zawadzka et al 2013bZawadzka et al , 2015b obtained by the THG technique. We used comparative model for explanation of our experimental results.…”

“…All measurements were carried out using the rotational Maker fringe technique (Maker et al 1962) in the transmission scheme (Zawadzka et al 2013b(Zawadzka et al , 2015bPłóciennik et al 2015). A silica glass plate has been used as reference materials for the third harmonic generation measurements.…”

“…For each sample, the measurements of the third harmonic signal intensity as a function of the angle of incidence was performed on a total of 40 laser impulses for each angular position. Finally, the so-called Maker (Maker et al 1962;Zawadzka et al 2013bZawadzka et al , 2015b fringes were generated by rotating the sample through the range of ±60°to the normal and recorded.…”