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 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.

Growth, Structural, NLO and Impedance Properties of Cu2+ doped Lithium Sulphate Monohydrate Single Crystals

2021 ◽  
Author(s):  
A Annalakshmi ◽  
K. Balasubramanian
Keyword(s):  
Single Crystals ◽  
Complex Impedance ◽  
Relative Dielectric Constant ◽  
Relaxation Mechanism ◽  
Tangent Loss ◽  
Monoclinic Crystal ◽  
Debye Relaxation ◽  
Nlo Property ◽  
Lithium Sulphate ◽  
Evaporation Technique

Abstract Single crystals of 2.5 mole% of Cu 2+ doped Lithium sulphate monohydrate (LSMH) have been grown using slow evaporation technique at room temperature. Powder X-ray diffraction (PXRD) analysis ensures that the crystal belongs to monoclinic crystal system. The variation of relative dielectric constant, dielectric loss and tangent loss with frequency have been discussed. The conductivity and dielectric relaxation mechanism involved in the grown crystals have been carried out by using complex impedance spectroscopy in the temperature range (343K and 353K) and in the frequency range from 20Hz to 2MHz. The frequency dependent ac conductivity obeys the Jonscher’s power law. The imaginary part Mʺ of electrical modulus of grown crystals shows the formation of asymmetric dispersion peak and indicating non- Debye relaxation behaviour. Morphology properties of the grown crystals have been studied using atomic force microscopy and hence the roughness of the grown crystals has been calculated. The NLO property and LDT values of the grown crystals are analysed using Nd:YAG laser operating at 1064 nm and 532 nm respectively.

scholarly journals Growth and Studies of Potassium Dihydrogen Phosphate Crystals Doped With Picric Acid

2018 ◽  
Vol 7 (1) ◽  
pp. 53-58
Author(s):  
T. Manju ◽  
P. Selvarajan
Keyword(s):  
Picric Acid ◽  
Potassium Dihydrogen Phosphate ◽  
Chemical Properties ◽  
Dihydrogen Phosphate ◽  
Kdp Crystal ◽  
Potassium Dihydrogen ◽  
Nlo Property ◽  
Evaporation Technique ◽  
Lcr Meter ◽  
Dta Studies

Potassium dihydrogen phosphate (KDP) crystal has been doped with picric acid to alter its physical and chemical properties. Picric acid doped KDP salt was synthesized by adding 2 mole% of picric acid into the aqueous solution of KDP. Using the synthesized salt of picric acid doped KDP and double distilled water, single crystals were grown by solution method with slow evaporation technique. The grown single crystal was subjected to XRD method to find the crystal structure. The functional groups of the sample were found by FTIR method. The elements in the picric acid doped KDP crystal were identified by EDAX and CHN analyses. SHG studies of the sample were done to check the second order NLO property. Dielectric studies for picric acid doped KDP crystal were carried out using a multi-frequency LCR meter. Thermal stability of the sample was found by TG/DTA studies. The microhardness of the sample was also measured at different applied low loads and the results obtained from the various studies are discussed.

Spectral Investigation on the Growth and Characterization of NLO Crystals of Thiourea Succinic Acid Single Crystal.

2015 ◽  
Vol 2 (2) ◽  
pp. 70-73
Author(s):  
Kannan.P ◽  
Thambidurai.S ◽  
Suresh.N
Keyword(s):  
Single Crystal ◽  
Succinic Acid ◽  
Slow Evaporation Technique ◽  
Absorption Studies ◽  
Dta Analysis ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Thermal Stability Of

Growth of optically transparent single crystals of thiourea succinic acid (TUSA) was grown successfully from aqueous solution by slow evaporation technique. The crystal structure was elucidated using the single crystal XRD. The various functional groups and the modes of vibrations were identified by FT-IR spectroscopic analysis. The optical absorption studies indicate that the optical transparency window is quite wide making its suitable for NLO applications. Thermal stability of the crown crystal carried out by TGA-DTA analysis.

scholarly journals Near-Infrared Spatial Self-Phase Modulation in Ultrathin Niobium Carbide Nanosheets

2021 ◽  
Vol 9 ◽  
Author(s):  
Si Xiao ◽  
Yi-lin He ◽  
Yu-lan Dong ◽  
Yi-duo Wang ◽  
Li Zhou ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Light Propagation ◽  
Near Infrared ◽  
Niobium Carbide ◽  
Infrared Region ◽  
Hybrid Structure ◽  
Optical Parameters ◽  
Self Phase Modulation ◽  
Non Linear ◽  
Linear Optical

Spatial self-phase modulation (SSPM) as a purely coherent non-linear optical effect (also known as Kerr effect) can support strong broadband phase modulation, which is essential for all-optical applications. Besides this, the increasing use of two-dimensional (2D) materials opens up new prospects in this field of research. In this work, we report a broadband SSPM response from 2D transition metal carbonitrides (MXenes) and Nb2C, arising in the near-infrared (1,550 nm) range. Based on the SSPM measurements of few-layer Nb2C nanosheets, the third-order non-linear optical parameters of Nb2C, including the non-linear refractive index n2 and susceptibility χ(3), were determined at 400, 800, 1,300, and 1,550 nm. Moreover, the physics mechanism of the dynamic formation process of SSPM diffraction rings was exploited. The formation time of SSPM diffraction rings can be divided into two typical parts which correspond to the polarization and reorientation of 2D Nb2C nanosheets. As a proof of concept, we demonstrate the nonreciprocal light propagation at wavelengths of 1,300 and 1,550 nm by constructing an Nb2C/water hybrid structure. Our results reveal strong optical phase modulation of Nb2C in the infrared region, thus showing the great potential of MXene materials for use in passive photonic devices.

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.

Electronic structure and large second-order non-linear optical property of COT derivatives – a theoretical exploration

2018 ◽  
Vol 20 (27) ◽  
pp. 18744-18755 ◽  
Author(s):  
Ria Sinha Roy ◽  
Prasanta K. Nandi
Keyword(s):  
Electronic Structure ◽  
Optical Property ◽  
Ring System ◽  
Second Order ◽  
Linear Optical Property ◽  
Nlo Property ◽  
Non Linear ◽  
New Strategy ◽  
Linear Optical

A new strategy to design new molecules based on a fused hydrocarbon ring system comprising a COT ring and two 5-membered rings has been proposed for the study of second order NLO property.

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.

Sign in / Sign up

Export Citation Format

Share Document