scholarly journals Growth and Characterizations of Organic NLO Imidazolium L-Tartrate (IMLT) Single Crystal

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Hiral Raval ◽  
B. B. Parekh ◽  
K. D. Parikh ◽  
M. J. Joshi
Keyword(s):  
Second Harmonic ◽  
Structural Parameters ◽  
Diffraction Method ◽  
Nir Spectroscopy ◽  
Optical Parameters ◽  
Dielectric Study ◽  
X Ray Diffraction ◽  
Monoclinic Crystal ◽  
Monoclinic Crystal Structure ◽  
Evaporation Technique

Good quality single crystals of organic imidazolium L-Tartrate (IMLT) are grown up from aqueous solution by slow solvent evaporation technique. Various structural parameters and monoclinic crystal structure have been confirmed using powder X-ray diffraction method. The presence of various functional groups has been identified by ATR-FTIR. UV-Vis-NIR spectroscopy has shown more than 60% of optical transparency with the lower UV cutoff at 245nm. The optical band gap value of the material is evaluated to be 4.8 eV. Other optical parameters such as refractive index, optical and electrical conductivity, Urbach energy, extinction coefficient, and optical and electrical susceptibility have been evaluated from transmission spectrum data. The above essential parameters manifest appropriate usage of IMLT as an NLO material. The thermogravimetric analysis indicates high thermal stability of material up to 214°C. Apart from that, the dielectric study at various temperatures confirms decrement of dielectric constant and dielectric loss at higher frequencies. The efficiency of Second Harmonic Generation (SHG) is found to be 3.5 times that of the KDP crystals. A range of analysis suggests suitability and potentiality of IMLT crystal for various optoelectronic applications.

scholarly journals Linear-nonlinear optical, dielectric and surface microscopic investigation of KH2PO4 crystal to uncover the decisive impact of dopant glycine

2018 ◽  
Vol 36 (4) ◽  
pp. 662-667 ◽  
Author(s):  
Imran Khan ◽  
S. Kalainathan ◽  
M.I. Baig ◽  
Mohd Shkir ◽  
S. Alfaify ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Structural Parameters ◽  
Microscopic Investigation ◽  
X Ray Diffraction ◽  
Kdp Crystal ◽  
Device Applications ◽  
Optical Dielectric ◽  
Evaporation Technique ◽  
The Comparative Study ◽  
The Impact

AbstractPresent investigation has been started to perform the comparative study of pure and glycine doped KH2PO4 (KDP) single crystals grown by most commercial slow solvent evaporation technique. The grown crystals were subjected to single crystal X-ray diffraction analysis to determine their structural parameters. The linear optical studies of pure and glycine doped KDP crystal have been undertaken within 200 nm to 1100 nm wavelength range by means of UV-Vis studies. The enhancement in second harmonic generation (SHG) efficiency of glycine doped KDP crystal has been determined using a standard Kurtz-Perry powder test. The dielectric measurements have been carried out to explore the impact of glycine dopant on dielectric constant and dielectric loss of KDP crystal. The surface growth habitat and etch pit density of glycine doped KDP crystal have been evaluated using the results of microscopic etching studies. In light of obtained results the suitability of glycine doped KDP crystal for device applications has been discussed.

GROWTH AND CHARACTERIZATION OF A NEW SEMI-ORGANIC NON-LINEAR OPTICAL CRYSTAL L-ARGININE HYDROCHLOROFLUORIDE MONOHYDRATE (LAHClF)

2006 ◽  
Vol 13 (06) ◽  
pp. 803-808 ◽  
Author(s):  
R. SIDDHESWARAN ◽  
R. SANKAR ◽  
M. RATHNAKUMARI ◽  
P. MURUGAKOOTHAN ◽  
R. JAYAVEL ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Nir Spectroscopy ◽  
Damage Threshold ◽  
Optical Transmittance ◽  
Laser Damage Threshold ◽  
X Ray Diffraction ◽  
Monoclinic Crystal ◽  
Non Linear ◽  
Linear Optical

A new non-linear optical mixed crystal of L-arginine hydrochlorofluoride monohydrate (LAHClF) has been grown by temperature lowering solution growth technique. The single crystal X-ray diffraction studies show that the LAHClF belongs to monoclinic crystal system. The optical transmittance of the crystal was studied by UV–Visible–NIR spectroscopy. Fourier transform infrared spectroscopy and thermal analysis were performed to study the molecular vibrations and thermal behavior of the crystals, respectively. The second harmonic generation intensity and laser damage threshold of the LAHClF crystal were measured. The mechanical strength of the material was determined by the Vickers hardness method.

scholarly journals Effect of thermal annealing on structural and optical properties of In doped Ge-Se-Te chalcogenide thin films

2019 ◽  
Vol 37 (4) ◽  
pp. 554-562 ◽  
Author(s):  
Pravin Kumar Singh ◽  
S.K. Tripathi ◽  
D.K. Dwivedi
Keyword(s):  
Thin Films ◽  
Optical Constants ◽  
Annealing Temperature ◽  
Structural Parameters ◽  
Average Crystallite Size ◽  
Optical Bandgap ◽  
Optical Parameters ◽  
X Ray Diffraction ◽  
Amorphous Nature ◽  
Evaporation Technique

AbstractThin films of Ge10–xSe60Te30Inx (x = 0, 2, 4 and 6) were developed by thermal evaporation technique. The annealing effect on the structural properties of Ge10–xSe60Te30Inx (x = 0, 2, 4 and 6) films has been studied by X-ray diffraction (XRD). The XRD results indicate amorphous nature of the as-prepared films whereas crystalline phases in annealed films were identified. Structural parameters such as average crystallite size, strain, and dislocation were determined for different annealing temperatures. Effect of annealing on optical constants of prepared films has been explored using UV-Vis spectrophotometer in the wavelength range of 400 nm to 1000 nm. Various optical constants were determined depending on annealing temperature. It has been noticed that the film transparency and optical bandgap Eg have been reduced whereas the absorption coefficient α and extinction coefficient k increased with increasing annealing temperature. It was found that the prepared samples obey the allowed direct transition. The reduction in optical bandgap with annealing temperature has been described by Mott and Davis model. Due to annealing dependence of the optical parameters, the investigated material could be utilized for phase change memory devices.

Structural and Optical Characterization of Zinc Telluride Thin Films

2013 ◽  
Vol 665 ◽  
pp. 254-262 ◽  
Author(s):  
J.R. Rathod ◽  
Haresh S. Patel ◽  
K.D. Patel ◽  
V.M. Pathak
Keyword(s):  
Thin Films ◽  
Extinction Coefficient ◽  
Nir Spectroscopy ◽  
Optical Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Evaporation Technique ◽  
Film Form ◽  
Znte Thin Films

Group II-VI compounds have been investigated largely in last two decades due to their interesting optoelectronic properties. ZnTe, a member of this family, possesses a bandgap around 2.26eV. This material is now a day investigated in thin film form due to its potential towards various viable applications. In this paper, the authors report their investigations on the preparation of ZnTe thin films using vacuum evaporation technique and their structural and optical characterizations. The structural characterization, carried out using an X-ray diffraction (XRD) technique shows that ZnTe used in present case possesses a cubic structure. Using the same data, the micro strain and dislocation density were evaluated and found to be around 1.465×10-3lines-m2and 1.639×1015lines/m2respecctively. The optical characterization carried out in UV-VIS-NIR region reveals the fact that band gap of ZnTe is around 2.2eV in present case. In addition to this, it was observed that the value of bandgap decreases as the thickness of films increases. The direct transitions of the carries are involved in ZnTe. Using the data of UV-VIS-NIR spectroscopy, the transmission coefficient and extinction coefficient were also calculated for ZnTe thin films. Besides, the variation of extinction coefficient with wavelength has also been discussed here.

Synthesis, Growth and Characterization of Organic Nonlinear Optical L-Asparagine L-Tartrate Single Crystals

2012 ◽  
Vol 584 ◽  
pp. 13-17 ◽  
Author(s):  
G. Peramaiyan ◽  
P. Pandi ◽  
B.M. Sornamurthy ◽  
R. Mohan Kumar
Keyword(s):  
Nonlinear Optical ◽  
Grown Crystal ◽  
Second Harmonic ◽  
Bulk Single Crystal ◽  
X Ray Diffraction ◽  
Ftir Studies ◽  
Slow Evaporation Technique ◽  
Evaporation Technique ◽  
Generation Test

L-asparagine L-tartrate (LAT), an organic compound has been synthesized from aqueous solution and bulk single crystal has been grown by slow evaporation technique. Powder X-ray diffraction studies confirmed the monoclinic structure of the grown LAT crystal. The presence of functional groups of the grown crystal was identified by FTIR studies. Linear optical property of the grown crystal was studied by UV-Vis spectral analysis. Microhardness studies reveal that the crystal possesses relatively higher hardness compared to other organic nonlinear optical crystals. Dielectric response of the L-asparagine L-tartrate crystal was analyzed for different frequencies at various temperatures. Kurtz-Perry powder second harmonic generation test confirmed the nonlinear optical properties of the as-grown LAT crystal.

scholarly journals Enhanced Linear and Non Linear Optical Activity of Lead Onto L-Threonine Cadmium Acetate Crystal

2021 ◽  
Author(s):  
Abila Jeba Queen M ◽  
K.C. Bright ◽  
S. Mary Delphine ◽  
P. Aji Udhaya
Keyword(s):  
Magnetic Behavior ◽  
Cadmium Acetate ◽  
Optical Parameters ◽  
Monoclinic Crystal ◽  
Nlo Property ◽  
Supramolecular Coordination ◽  
Dta Analysis ◽  
Evaporation Technique ◽  
Linear Optical ◽  
Lcr Meter

Abstract Herein, we describe the growth and characterization of new crystal lead doped L-Threonine cadmium acetate (LTCA). The supramolecular coordination compounds are crystallized by slow evaporation technique at ambient temperature. The X-ray diffraction techniques confirm monoclinic crystal system and the presence of lead onto the LTCA lattice. L-Threonine amino acids have the unique properties like zwitter ionic nature and molecular chirality, which improves the optical properties of the crystal. The linear optical parameters such as optical band gap and refractive indexes are estimated from Uv-Vis analysis. The variation of dielectric constant, dielectric loss with frequency is studied using LCR meter. Due to the electropositive character of lead the static permittivity increases. Magnetic behavior changes to paramagnetic nature due to the inclusion of lead. TG/DTA analysis suggests, the crystal is thermally stable up to 135.32°C. Using Nd-YAG laser the NLO property was studied and the crystal shows higher SHG efficiency than the LTCA crystal.

scholarly journals Synthesis, Spectral, Structural and Thermal Characterization of Inorganic Crystal: Phenyl Trimethylammonium Tetrachlorocobaltate

2019 ◽  
Vol 31 (8) ◽  
pp. 1779-1784
Author(s):  
V. Mohanraj ◽  
R. Pavithra ◽  
M. Thenmozhi ◽  
R. Umarani
Keyword(s):  
Three Dimensional ◽  
Thermal Characterization ◽  
Dimensional Structure ◽  
X Ray Diffraction ◽  
Monoclinic Crystal ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Thermal Stability Of ◽  
Ft Ir Spectroscopy

Phenyl trimethylammonium tetrachlorocobaltate, crystals were grown by slow evaporation technique. The crystal was bright, transparent. The three dimensional structure of the phenyl trimethylammonium tetrachlorocobaltate was obtained from single crystal X-ray diffraction studies. The molecule belongs to monoclinic crystal system with C2/c space group. The presence of functional groups and modes of vibrations were identified by FT-IR spectroscopy. 1H NMR spectroscopy was also used to characterise the compound and the thermal stability of the crystal was established by TGA/DT analysis. This work undergoes phase transition which makes the study interesting.

Mechanical, Electrical, Linear and Nonlinear optical behavior of gamma irradiated thiourea doped lithium sulfate single crystals

2020 ◽  
Author(s):  
Dileep M S ◽  
Suresh Kumar H.M. ◽  
Sindhu Tilak
Keyword(s):  
Energy Gap ◽  
Second Harmonic ◽  
Visible Region ◽  
Irradiation Effect ◽  
Lithium Sulfate ◽  
Monoclinic Crystal ◽  
Cell Parameters ◽  
Evaporation Technique ◽  
Gamma Radiations ◽  
Gamma Irradiated

The thiourea doped lithium sulfate single crystal was grown by solution growth slow evaporation technique. The unit cell parameters of the grown crystal determined by X-ray diffraction studies indicated that the crystal belongs to a monoclinic crystal system with noncentrosymmetric space group P2. UV-visible spectral study signified that the crystal possesses an energy gap of 4.54 eV with 68% transparency in the visible region. The grown crystals were irradiated by Co-60 gamma radiations with different doses of 10 kGy, 30 kGy & 50 kGy and studied irradiation effect on powder XRD, dielectric properties, mechanical hardness, linear transmittance and second harmonic generation of the crystal. It is observed that the crystallite size, energy gap and transparency are decreased; whereas, the dielectric constant, AC conductivity, microhardness and SHG efficiency are increased upon an increase in radiation dose.

scholarly journals Investigation on optical, electrical and etching properties of 2-aminopyridinium 4-aminobenzoate: A phase matchable organic single crystal for optoelectronic device applications

2017 ◽  
Vol 35 (1) ◽  
pp. 126-134 ◽  
Author(s):  
L. Chandra ◽  
J. Chandrasekaran ◽  
K. Perumal ◽  
B. Babu ◽  
V. Jayaramakrishnan
Keyword(s):  
Optoelectronic Device ◽  
Spectroscopic Studies ◽  
Average Particle ◽  
Dielectric Study ◽  
X Ray Diffraction ◽  
Device Applications ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Homo Lumo

AbstractNLO active 2-aminopyridinium 4-aminobenzoate (APAB) single crystals were successfully grown by the standard slow evaporation technique. The crystallinity of the grown crystals was analyzed through X-ray diffraction (XRD) measurements. Fourier transform infrared (FT-IR) spectroscopic studies were also performed for the identification of different modes present in the compound. The UV-Vis absorption and transmittance spectra were recorded for the grown crystal and the optical band gap was calculated. Birefringence and etching studies were also carried out. The dielectric study showed that the dielectric constant decreased with an increase in frequency. The photoconductivity study revealed its positive photoconducting nature. Theoretical HOMO LUMO investigations were also made for the crystal. The relative SHG efficiency of the material was investigated by the Kurtz and Perry powder technique. The phase matching property of the crystal was studied through the SHG dependence of average particle sizes.

Growth, structural, spectroscopic, thermal, dielectric and optical study of cobalt sulphide-doped ADP crystals

2017 ◽  
Vol 31 (27) ◽  
pp. 1750246 ◽  
Author(s):  
A. P. Kochuparampil ◽  
J. H. Joshi ◽  
M. J. Joshi
Keyword(s):  
Nonlinear Optical ◽  
Second Harmonic ◽  
Dihydrogen Phosphate ◽  
Optical Parameters ◽  
Dielectric Study ◽  
Cobalt Sulphide ◽  
Vis Spectroscopy ◽  
Chemical Technique ◽  
Wet Chemical Technique ◽  
Xrd Patterns

As ammonium dihydrogen phosphate (ADP) is a popular nonlinear optical crystal, to engineer its linear and nonlinear optical properties, the chalcogenide compound cobalt sulphide (CoS) was doped and the crystals were grown by the slow solvent evaporation method. To increase the solubility of CoS in water, its nanoparticles were synthesized by wet chemical technique using ethylene diamine as the capping agent followed by microwave irradiation. The nanoparticle sample exhibited finite solubility in water and was used to dope in ADP crystals. The powder XRD patterns showed the single phase nature of the doped crystals. The FTIR spectra confirmed the presence of various functional groups and EDAX gave the estimation of Co and S elements. The EPR spectroscopy also confirmed the presence of cobalt in the doped samples. TGA indicated slightly less thermal stability of the doped crystals compared to the pure ADP. The dielectric study was carried out at room temperature in the frequency range from 100[Formula: see text]Hz to 1[Formula: see text]MHz. Also, various linear optical parameters were evaluated for pure and doped crystals using UV–Vis spectroscopy. The second harmonic generation (SHG) efficiency of Nd:YAG laser was evaluated by the Kurtz and Parry method for the doped samples, it was found to be slightly lesser than that of the pure ADP crystals.

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