Third-order Nonlinear Optical Properties and Crystal Structures of N-(2-Nitrobenzalidene)-2,4-dimethylaniline and N-(3-Nitrobenzalidene)- 2,4-dimethylaniline

2007 ◽  
Vol 62 (11) ◽  
pp. 1437-1442 ◽  
Author(s):  
Aslı Karakaş ◽  
Hüseyin Ünverb ◽  
Ayhan Elmalı
Keyword(s):  
Nonlinear Optical ◽  
Photon Absorption ◽  
X Ray Diffraction ◽  
Third Order ◽  
X Ray ◽  
Hartree Fock ◽  
The Third ◽  
Near Ir ◽  
Zero Values ◽  
Insight Into

N-(2-nitrobenzalidene)-2,4-dimethylaniline (1) and N-(3-nitrobenzalidene)-2,4-dimethylaniline (2) have been synthesized and characterized by X-ray diffraction analysis. Linear optical characteristics have been evaluated theoretically using the configuration interaction (CI) method. The maximum one-photon absorption (OPA) wavelengths of the studied compounds are shorter than 450 nm, giving rise to good optical transparency in the visible and near IR regions. To provide an insight into the third-order nonlinear optical (NLO) behavior of the title molecules, both dispersion-free (static) and frequency-dependent (dynamic) linear polarizabilities (α) and second hyperpolarizabilities (γ) at λ = 825 - 1125 nm and 1050 - 1600 nm wavelength ranges have been computed using the time-dependent Hartree-Fock (TDHF) method. The ab initio computational results on (hyper)polarizabilities reveal that both compounds exhibit second hyperpolarizabilities with non-zero values, implying microscopic third-order NLO behavior.

Structure, Spectroscopic Study and ab initio Calculations on Third-order Nonlinear Optical Behavior of N-(2-Hydroxy-4-methoxybenzylidene)-3- nitroaniline

2008 ◽  
Vol 63 (11) ◽  
pp. 1315-1320
Author(s):  
Hüseyin Üver ◽  
Aslı Karaka§ ◽  
Ayhan Elmalı ◽  
T. Nuri Durlu
Keyword(s):  
Ab Initio ◽  
Nonlinear Optical ◽  
Photon Absorption ◽  
X Ray Diffraction ◽  
Third Order ◽  
Hartree Fock ◽  
H Nmr ◽  
Calculation Results ◽  
Zero Values ◽  
Optical Behavior

Abstract N-(2-hydroxy-4-methoxybenzylidene)-3-nitroaniline (1) has been synthesized and characterized by X-ray diffraction analysis, FTIR and 1H NMR spectroscopy. The maximum one-photon absorption (OPA) wavelengths recorded by quantum mechanical computations using a configuration interaction (CI) method are estimated in the UV region to be shorter than 450 nm, showing good optical transparency to the visible light. We have computed both dispersion-free (static) and also frequency-dependent (dynamic) linear polarizabilities (α) and second hyperpolarizabilities (γ) by using the time-dependent Hartree-Fock (TDHF) method to provide an insight into the microscopic third-order nonlinear optical (NLO) behavior of the title compound. The ab initio calculation results with non-zero values on (hyper)polarizabilities indicate that the synthesized molecule might possess microscopic third-order NLO phenomena.

scholarly journals Third-order Nonlinear Optical Properties of Copper(II)bis{2-[(4-iodophenyl)iminomethyl]-6-methoxy-phenolate}

2006 ◽  
Vol 61 (11) ◽  
pp. 1355-1360 ◽  
Author(s):  
Halime G. Yaglioglu ◽  
Asli Karakaş ◽  
Hseyin Ünver ◽  
Ayhan Elmali
Keyword(s):  
Title Complex ◽  
X Ray Diffraction ◽  
Metal Centre ◽  
Visible Spectroscopy ◽  
Third Order ◽  
X Ray ◽  
Hartree Fock ◽  
Near Ir ◽  
Square Planar ◽  
Uv Visible

Copper(II)bis{2-[(4-iodophenyl)iminomethyl]-6-methoxy-phenolate} has been synthesized, characterized by UV-visible spectroscopy, and its crystal structure determined by X-ray diffraction. The Cu atom is situated on a twofold axis and the geometry around the metal centre can be described as distorted square planar with a trans configuration. The absorption maxima are shorter than 450 nm, giving rise to good optical transparency in the visible and near IR. To reveal the microscopic thirdorder NLO properties, the static second hyperpolarizabilities have been evaluated by using the ab initio time-dependent Hartree-Fock (TDHF) method. According to the results, the title complex exhibits non-zero γ values, implying microscopic third-order NLO behavior.

Syntheses, Structures and Second-order Nonlinear Optical Behavior of (E)-N-(4-Nitrobenzylidene)-3,4-dimethylaniline and (E)-N-(3-Nitrobenzylidene)-3,4-dimethylaniline

2010 ◽  
Vol 65 (2) ◽  
pp. 185-190 ◽  
Author(s):  
Hüseyin Unver ◽  
Aslí Karakas ◽  
Tahsin Nuri Durlu
Keyword(s):  
Ab Initio ◽  
Nonlinear Optical ◽  
Second Order ◽  
X Ray Diffraction ◽  
X Ray ◽  
Near Ir ◽  
Vis Spectroscopy ◽  
Zero Values ◽  
Moller Plesset ◽  
Optical Behavior

(E)-N-(4-Nitrobenzylidene)-3,4-dimethylaniline (1) and (E)-N-(3-nitrobenzylidene)-3,4-dimethylaniline (2) have been synthesized, and their crystal structures have been determined by X-ray diffraction analysis. Linear optical characteristics have been evaluated experimentally using UV/Vis spectroscopy and theoretically using the configuration interaction (CI) method. The maximum onephoton absorption (OPA) wavelengths of the studied compounds are shorter than 450 nm, giving rise to good optical transparency in the visible and near IR regions. The ab initio quantum-mechanical calculations (finite field second-order Møller-Plesset perturbation theory) of the investigated molecules have been carried out to compute the electric dipole moment (μ) and the first hyperpolarizability (β ) values. The ab initio results suggest that the title compounds might have microscopic second-order nonlinear optical (NLO) behavior with non-zero values.

OPTICAL AND STRUCTURAL PROPERTIES OF SILVER NANOPARTICLES EMBEDDED IN INDIUM OXIDE FILMS

2011 ◽  
Vol 10 (03) ◽  
pp. 433-440 ◽  
Author(s):  
A. A. DAKHEL ◽  
F. Z. HENARI
Keyword(s):  
Indium Oxide ◽  
Nonlinear Optical ◽  
Silicon Substrates ◽  
X Ray Diffraction ◽  
Third Order ◽  
X Ray ◽  
Reverse Saturation Absorption ◽  
Saturation Absorption ◽  
Order Susceptibility ◽  
Nanoparticles Of Silver

Nanoparticles of silver-embedded indium oxide thin films have been prepared on glass and silicon substrates. Silver concentration were 3 wt.% and 5 wt.% as measured by X-ray fluorescence. X-ray diffraction reveals that indium oxide of these samples remains amorphous even after pre-annealing at 400°C. The optical absorption of the samples manifests the surface plasmon resonance (SPR) phenomena, which varies with Ag content. The Ag nanoparticles radius was estimated with Mie classical theory by using the SPR data analysis. The nonlinear optical properties of films on glass substrate were investigated using z-scan technique. Under cw excitation the films exhibit large reverse saturation absorption and negative nonlinearities. The real and imaginary parts of third order susceptibility of the samples were measured and the imaginary part which arise from the change in absorption is found to be dominant.

SYNTHESIS, CRYSTAL STRUCTURE, SPECTROSCOPIC STUDIES AND AB-INITIO CALCULATIONS ON THIRD-ORDER OPTICAL NONLINEARITY OF A FIVE-COORDINATE CHLOROIRON(III) COMPLEX

2007 ◽  
Vol 16 (03) ◽  
pp. 329-341 ◽  
Author(s):  
ASLI KARAKAS ◽  
EMINE DONMEZ ◽  
HULYA KARA ◽  
AYHAN ELMALI
Keyword(s):  
Ab Initio ◽  
Optical Nonlinearity ◽  
Spectroscopic Studies ◽  
Optical Measurements ◽  
Photon Absorption ◽  
X Ray Diffraction ◽  
Third Order ◽  
Hartree Fock ◽  
Vis Spectroscopy ◽  
Calculation Results

A five-coordinate chloroiron(III) complex has been synthesized and characterized by X-ray diffraction analysis and UV-Vis spectroscopy. The maximum one-photon absorption (OPA) wavelengths recorded by both linear optical measurements and quantum mechanical computations using the configuration interaction (CI) method are estimated to be shorter than 400 nm in the UV region, showing good optical transparency to visible light. To investigate the microscopic third-order nonlinear optical (NLO) behavior of the title compound, we have computed both dispersion-free (static) and also frequency-dependent (dynamic) linear polarizabilities (α) and second hyperpolarizabilities (γ) at λ = 825–1125 nm and 1050–1600 nm wavelength areas using the time-dependent Hartree–Fock (TDHF) method. The ab-initio calculation results with non-zero values on (hyper)polarizabilities indicate that the synthesized molecule might possess microscopic third-order NLO phenomena.

Third-order optical nonlinearity of DSR13/THF solutions under CW He–Ne laser irradiation using Z-scan method

2021 ◽  
pp. 1-7
Author(s):  
Bassam Abbas ◽  
Mohammad Alshikh Khalil
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Nonlinear Absorption ◽  
Nonlinear Refractive Index ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Photon Absorption ◽  
Third Order ◽  
The Third ◽  
Order Susceptibility

The Z-scan technique was employed to explore the third-order nonlinear optical properties of disperse red 13 organic chromophore solutions in tetrahydrofuran. A continuous-wave He–Ne laser (632.8 nm) was used as a source of irradiation. The nonlinear absorption and nonlinear refractive index coefficients of this dye were investigated. The results showed that this dye has a good nonlinear response with its real and imaginary quantities of third-order susceptibility. The solutions showed negative nonlinear refraction. The best obtained value of the third-order susceptibility was 6.37 × 10–3 esu at a dye concentration of 3.15 × 10–4 mol/L. Moreover, the nonlinear optical properties were enhanced with higher dye concentrations, and an elevated trend in nonlinear absorption and nonlinear refractive index coefficients was observed. Also, it was found that the reverse saturable absorption was the main mechanism responsible for the two-photon absorption effect in DSR13/THF samples.

In situ growth of an ethyl p-hydroxybenzoate single crystal by the vertical Bridgman technique: a potential nonlinear optical material for third-harmonic generation

2021 ◽  
Vol 54 (5) ◽  
pp. 1340-1348
Author(s):  
Debabrata Nayak ◽  
N. Vijayan ◽  
Manju Kumari ◽  
Kiran ◽  
Nikita Vashistha ◽  
...  
Keyword(s):  
Single Crystal ◽  
Laser Damage Threshold ◽  
Laser Source ◽  
Dihydrogen Phosphate ◽  
X Ray Diffraction ◽  
Bridgman Technique ◽  
Third Order ◽  
X Ray ◽  
The Third ◽  
Vertical Bridgman

Optically transparent single crystals of ethyl p-hydroxybenzoate (EPHB) were successfully grown by the vertical Bridgman technique. The crystalline phase and unit-cell dimensions were obtained from powder X-ray diffraction using Rietveld analysis. The presence of defects and grain boundaries was investigated by high-resolution X-ray diffraction. The optical quality of the grown single crystal was assessed by UV–Vis and photoluminescent spectroscopies. A blue emission, with a bi-exponential decay time, was obtained from time-resolved photoluminescence upon laser excitation at 266 nm. The mechanical strength of the EPHB single crystal was studied by Vickers hardness testing. A decrease in the laser-damage threshold was observed with a nanosecond Nd:YAG laser source for increased pulse repetition rates. The third-order nonlinearity, nonlinear absorption coefficient and nonlinear refractive index were measured using the Z-scan technique with a femtosecond Ti:sapphire laser. The third-order nonlinear coefficient values for the grown crystal were compared with those of a potassium dihydrogen phosphate single crystal.

scholarly journals Structural, Microhardness, Photoconductivity, and Dielectric Properties of Tris(thiourea) Cadmium Sulphate Single Crystals

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
A. P. Arthi ◽  
M. Sumithra Devi ◽  
K. Thamizharasan
Keyword(s):  
Single Crystals ◽  
Nonlinear Optical ◽  
Grown Crystal ◽  
Nonlinear Optical Property ◽  
X Ray Diffraction ◽  
Third Order ◽  
X Ray ◽  
Self Focusing ◽  
System Cell ◽  
Vicker’S Microhardness

Semiorganic nonlinear optical tris(thiourea) cadmium sulphate (TTCS) single crystals were grown by slow evaporation method. The crystal system, cell parameter of the grown crystal, was identified by powder X-ray diffraction study. The self-focusing Z-scan technique has been employed to observe the third-order nonlinear optical property of the grown crystal. The mechanical property of the grown crystal was examined by using Vicker’s microhardness test. Chemical etching studies were made on the TTCS crystal using water as an etchant. The dark current and photocurrent properties of the crystal were estimated by using photoconductivity study. The dielectric constant of grown crystal was studied in different temperature by varying applied frequencies.

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