Characterization and third harmonic generation calculations of undoped and doped spin-coated multilayered CuO thin films

The paper presents the physical characterizations of undoped and (Sn, Mn, Fe and In) doped Cupric Oxide (CuO) thin films prepared by sol-gel spin-coating process. The first aim of the work is to investigate the relation between the electrical resistivity and the third order nonlinear optical susceptibility of pure deposited CuO films, second is to explore the impact of introducing diverse dopants on the nonlinear optical responses. In this study, we demonstrate that we can control the electrical and also the nonlinear optical properties of the obtained structure using a different number of deposited layers. Moreover, the influence of doping due to variations in the microstructure and morphology is examined and discussed. © 2018 Elsevier Lt

Nonlinear refraction and absorption activity of dimethylaminostyryl substituted BODIPY dyes

International audienceOptical and nonlinear optical properties of difluoroboradiazaindacene (BODIPY) models with attached dimethylaminostyryl substituents were studied. The optical absorption and fluorescence emission of BODIPY compounds were found to be dependent on the number of dimethylaminostyryl substituents. In order to investigate the nonlinear refraction and absorption activity, the Z-scan technique was used employing a laser generating a wavelength at 532 nm with 30 ps pulse duration. The studied dimethylaminostyryl containing BODIPY compounds showed considerable nonlinear refraction and reverse saturable absorption. The BODIPY containing a pair of dimethylaminostyryl substituents demonstrated an increased third order nonlinear optical response mostly due to the extension of its conjugated length. © 2016 The Royal Society of Chemistry

New architecture of organo electronic chalcones derivatives: Synthesis, crystal structures and optical properties

International audienc

DFT analysis and third-harmonic generation properties of one series of push–pull benzylidenemalononitrile derivatives

Optical and nonlinear optical properties of benzylidenemalononitrile derivatives with different electron-donating groups’ substituents were studied. Four benzylidenemalononitrile derivatives [benzylidenemalononitrile (1), (4-chlorobenzylidene)malononitrile (2), (4-hydroxybenzylidene)malononitrile (3) and (4-(dimethylamino)benzylidene)malononitrile (4)] were functionalized, synthesized and analyzed using 1H NMR, FTIR, and UV–vis. A study of electrochemical properties was conducted using cyclic voltammetry. The third-harmonic generation technique was used to analyze and evaluate the susceptibility ($$\chi_{{{\text{THG}}}}^{ }$$) of cubic nonlinear optical properties on thin films at 1064 nm. THG measurements using the Maker fringe technique were used to analyze and evaluate the susceptibility $$\chi_{{}}^{ }$$ parameter of thin films of PMMA with embedded molecules. The studied benzylidenemalononitrile substituted with a strong electron-donating group showed considerable nonlinear responses. Theoretical analysis was performed using DFT/B3LYP/6-311G++ (d, p) and Gaussian 09 program quantum chemical calculations. Third-order nonlinear optical response increases proportionally with the electron-donating character of the substituent groups

Theoretical and experimental investigation of multifunctional highly conjugated organic push-pull ligands for NLO applications

International audienc

Transition metals induce control of enhanced NLO properties of functionalized organometallic complexes under laser modulations

International audienceThe molecular engineering of organometallic complexes has recently attracted renewed interest on account of their potential technological applications for optoelectronics in general and optical data storage. The transition metal which induces control of enhanced nonlinear optical properties of functionalized organometallic complexes versus not only the intensity but also the polarization of the incident laser beam is original and important for all optical switching. This makes organometallic complexes valuable and suitable candidates for nonlinear optical applications. In the present work, we report the synthesis and full characterization of four organometallic complexes consisting of N, N-dibutylamine and azobenzene fragments but differ by auxiliary alkynyl ligands or metal cations. Thus, a ferrocenyl derivative 1 and three ruthenium complexes 2-4 have been prepared. The nonlinear optical properties of the four new azo-based ruthenium and iron organometallic complexes in the solid state, using polymethylmethacrylate as matrix, have been thoroughly studied. This concept is extended to computing the HOMO and LUMO energy levels of the considered complexes, dipole moment, first and second order hyperpolarizabilities using the 6-31 + G(d,p) + LANL2DZ mixed basis set. The second and third nonlinear optical properties of the resulting polymer composites were obtained by measuring SHG and THG response by means of the Maker fringe technique using a laser generating at 1,064 nm with a 30 ps pulse duration. The values of the second and third order NLO susceptibilities of the four organometallic complexes were found to be higher than the common references used. Theoretical calculation shows that the large first and second order hyperpolarizablities are caused by strong intramolecular charge transfer between the transition metal parts and the ligands though a conjugated transmitter. These results indicate that the present organometallic complexes are valuable candidates for optoelectronic and photonic applications