Linear and nonlinear optical properties of tris thiourea zinc sulphate single crystals

Girisun, T.C. Sabari; Dhanuskodi, S.

doi:10.1002/crat.200900351

Cited by 246 publications

(27 citation statements)

References 9 publications

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“…For the materials under consideration, equation (6) can be well fitted with n=2 and, therefore, the optical transition in ZTS crystals is of the direct allowed type. This result agrees well to the literature [19,20,29]. For direct allowed transitions, equation (6) can be written in the following form:…”

Section: Resultssupporting

confidence: 92%

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Influence of cobalt-doping on the optical properties of zinc tris–thiourea sulfate (ZTS) single crystal

Abdulwahab

2018

J. Phys. Commun.

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Zinc tris-thiourea sulfate (ZTS) single crystals, pure and doped with different concentrations of cobalt, were synthesized and grown by the slow evaporation technique of supersaturated aqueous solutions at 315 K. Co 2+ concentration in the solution was 2, 4 and 6 mol%. Optical transmittance was measured for the obtained crystals as a function of wavelength in the range of 190-900 nm. The present investigation shows that doping ZTS crystal with Co 2+ modifies its optical properties. The absorption coefficient of ZTS crystal exhibits an exponential dependence on photon energy following Urbach relation. Doping ZTS crystal with Co 2+ changes the values of optical transmittance, cut off wavelength, absorption coefficient, optical energy gap, Urbach tail energy and steepness parameter. The changes are systematic i.e. the mentioned optical parameters increase or decrease continuously with increasing Co 2+ concentration in the growth solution. The electrical conduction of ZTS crystal is increased with cobalt doping. The Urbach tail energy changes reversely with the optical energy gap.

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Section: Resultssupporting

confidence: 92%

“…The crystal growth and characterization of ZTS crystal have been studied [13][14][15][16]. Since ZTS crystal is a promising NLO material, its optical properties were the subject of numerous articles [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Influence of cobalt-doping on the optical properties of zinc tris–thiourea sulfate (ZTS) single crystal

Abdulwahab

2018

J. Phys. Commun.

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“…9a, b, the imaginary parts of the optical conductivity of the MDMO-PPV polymer are higher than the real parts of the optical conductivity. The optical conductivity (σ opt ) is a measure of the frequency response of the material when irradiated with light and σ opt can also be calculated as [52,53],…”

Section: Resultsmentioning

confidence: 99%

Optical properties of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene] light-emitting polymer solutions: effects of molarities and solvents

Gündüz

2015

Polym. Bull.

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The optical properties of the solutions of the MDMO-PPV light-emitting polymer were investigated. The maximum mass extinction coefficient values of the solutions of the MDMO-PPV for 6.640 and 3.014 µM were found to be 20.874 and 42.009 L g −1 cm −1 , respectively. The absorption band edge values of the solutions of the MDMO-PPV shifted from 2.149 to 1.987 eV with increasing molarity. To obtain lower E g values (2.020, 2.057, 2.083, 2.088 and 2.103 eV, respectively) of the MDMO-PPV can be preferred xylene, toluene, chlorobenzene, chloroform and tetrahydrofuran solvents, respectively. The E g of the solution of the MDMO-PPV was decreased with molarities and solvents. The refractive index values of the MDMO-PPV were controlled with various solvents. The optical parameters such as single oscillator energy, dispersion energy, M −1 , M −3 moments, optical oscillator strengths, linear static refractive index, optical linear susceptibility, third-order nonlinear susceptibility and nonlinear refractive index were calculated using Wemple-DiDomenico equation. The highest contrast was obtained with xylene, while the lowest contrast was obtained with chlorobenzene. The MDMO-PPV can be used in the fabrication of the metal-semiconductor contacts due to low optical band gap and suitable optical parameters. Also, the surface morphology properties of the MDMO-PPV polymer film were investigated.

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“…(1) was used. Magnitude and the sign of the nonlinear phase shift can be determined [12][13][14][15], given by where S is the linear aperture transmittance and can be determined using:…”

Section: Resultsmentioning

confidence: 99%

Nonlinear optical properties of carboxymethyl starch nanocomposite by Z-scan technique using a Nd–YAG laser

2015

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the importance of polyaniline and by modifying its properties with composites, additionally, considering the importance of starch in constructing deflectable polymers, it has been decided to construct a nanoscale from carboxymethyl starch by modifying the structure and methylation of the polymer. Due to their nanometer sizes, filler dispersion nanocomposites exhibit considerably improved properties when compared to the pure polymers or their traditional composites. Increased modulus and strength, outstanding barrier properties, improved solvent and heat resistance and decreased flammability are among the characterization techniques. Therefore, by using carboxymethyl starch (SCOOH), increasing polar properties and increasing these natural polymers in the polyaniline matrix, certain effects and results such as modification of thermal properties, solubility and the increase in water absorption in starch without changing or impairing properties of the polymer were observed, including thermal properties and conduction. These nanomaterials are widely employed in optoelectronics, electronics, medicine and photonics [3][4][5][6]. In addition to these interesting properties, the potential technological applications such as an active material in electrooptical devices, modulators and optical switches also can be found [7]. Third-order nonlinearity in conducting materials is extremely important parameter because of its various properties, including multi-photon absorption, free carrier absorption, nonlinear scattering and refraction [8,9].Nonlinear optical absorption and refraction of the nanocomposite were investigated in two different solvents using open and closed aperture Z-scan techniques, respectively. The synthesized sample has been characterized for its nanostructures by using an X-ray diffractometer (XRD) and scanning electron microscopy (SEM). Also, the linear optical properties, including UV-Visible absorption, were measured.Abstract In this paper, the third-order nonlinear optical properties of modified nanocomposite carboxymethyl starch are presented. The nanocomposite of carboxymethyl starch has been synthesized by a chemical technique. X-ray diffraction and scanning electron microscopy were used to study its crystal structure. Linear optical response of this sample was studied by using UV-Visible spectroscopy. Nonlinear refraction and absorption coefficients of the nanocomposite were measured in two different solvents, dimethylformamide and N-methylpyrrolidone, by Z-scan method using a continuous wave Nd-YAG laser at 532 nm. The measured values of nonlinear refraction in both of the solutions were from the order of 10 −6 cm 2 /W.

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Linear and nonlinear optical properties of tris thiourea zinc sulphate single crystals

Cited by 246 publications

References 9 publications

Influence of cobalt-doping on the optical properties of zinc tris–thiourea sulfate (ZTS) single crystal

Influence of cobalt-doping on the optical properties of zinc tris–thiourea sulfate (ZTS) single crystal

Optical properties of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene] light-emitting polymer solutions: effects of molarities and solvents

Nonlinear optical properties of carboxymethyl starch nanocomposite by Z-scan technique using a Nd–YAG laser

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