Guanidinium trichloroacetate (GTCA), a novel organic single crystal was grown by a slow evaporation technique. The single crystal X-ray diffraction study revealed that the GTCA crystal belongs to tetragonal crystal system with the space group P41. From the linear optical studies, the lower cut-off wavelength of grown crystal was found at 257[Formula: see text]nm. The luminescent study showed that the GTCA crystal has high degree of luminescence. The single shot laser damage threshold of grown crystal is found to be 2.6[Formula: see text]GW/cm2. The nonlinear refractive index, absorption coefficient and third-order susceptibility were estimated by Z-scan technique. The two independent tensor coefficients [Formula: see text] of the dielectric permittivity were calculated.

Kalainathan S

Department of Physics

School of Advanced Sciences

Vellore Campus

Dhavamurthy M

Peramaiyan G

Nizam Mohideen M

Mohan R.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Structural, growth and optical characterizations of an organic third-order nonlinear crystal: Guanidinium trichloroacetate

Journal of Nonlinear Optical Physics & Materials

DAE SOLID STATE PHYSICS SYMPOSIUM 2018

Electronic, nonlinear optical and optical limiting properties of 2-amino-3-propanoic 4-methylbenzenesulfonate (2A3PMS) single crystal

An organic nonlinear optical material, guanidinium tosylate was synthesized adopting slow evaporation method and the crystals were harvested from aqueous methanolic medium with dimensions 13 × 9 × 3 mm3. Constitution of crystalline material was confirmed by single crystal X-ray diffraction study. The title compound crystallizes in the monoclinic crystal system with space group P21/c. The UV–vis–NIR spectral study of the grown crystal exhibits high transparency of 80% in the entire visible region with lower cut-off wavelength at 282 nm. Optimized molecular geometry of the grown crystal was obtained using density functional theory (DFT) and the frontier energy gaps calculated from the DFT aids to understand the charge transfer taking place in the molecule. The dielectric properties were studied as a function of temperature and frequency to find the charge distribution within the crystal. The titular compound is thermally stable up to 230 °C assessed by thermogravimetric and differential thermal analysis. Anisotropy in the mechanical behavior was observed while measuring for individual planes. The laser induced surface damage threshold of the grown crystal was measured to be 0.344 GW/cm2 for 1064 nm Nd:YAG laser radiation. Z-scan technique confirms the third-order nonlinear optical property with the ascertained nonlinear refractive index (n2), nonlinear absorption coefficient (β) and third order nonlinear susceptibility (χ(3)). Optical limiting study divulges that the transmitted output power step-up linearly with the increase of the input power at lower power realms and saturates from the threshold 24.95 mW/cm2 and amplitude 0.23 mW/cm2. © 2017 Elsevier Ltd

Optics & Laser Technology

Synthesis, growth, structural modeling and physio-chemical properties of a charge transfer molecule: Guanidinium tosylate

An organic conjugated chromophore DL-mandelic acid (DLMA) single crystal was synthesized and grown-up by means of slow evaporation technique. Single crystal X-ray diffraction study proclaimed that the DLMA crystal crystallized in monoclinic system with centrosymmetric space group P21/c. The various characteristic fundamental vibration frequencies were identified by FTIR spectroscopic studies. UV–visible spectral analysis concluded that the lower cut-off wavelength and calculated direct optical band gap of DLMA as 257 nm and 5.40 eV respectively. Thermal property of DL-mandelic acid was established through thermogravimetric and differential scanning calorimetric technique. The electric field response of DLMA crystal was investigated from the dielectric studies at a few selected temperatures and frequencies. The quantum chemical assessments such as HOMO-LUMO, molecular electrostatic potential and NLO activity were calculated and presented. In order to determine mechanical strength of DLMA crystal for various loads using Vickers microhardness tester. The real and imaginary parts of the third-order susceptibility (χ3) were evaluated with the Z-scan technique using closed and open signatures respectively and was found to be Re (χ3) = 4.15 × 10−6 esu and Im (χ3) = 0.47 × 10−6 esu. © 2017 Elsevier B.V.

Journal of Molecular Structure

Growth and characterization of dl -Mandelic acid (C 6 H 5 CH(OH)CO 2 H) single crystal for third-order nonlinear optical applications

Transparent single crystal of bis guanidinium hydrogen phosphate monohydrate of length 45 mm and diameter 16 mm have been grown from saturated solution of deionized water adopting Sankaranarayanan-Ramasamy method. Optical properties such as its transmittance, band gap, Phase-matching angle, spectral phase matching bandwidth were measured and their values are compared with the standard compounds. Third order nonlinear optical property was found using Z-scan technique. Optical limiting property of the title material has also been discussed. © 2016

Journal of Crystal Growth

Single crystal growth of bis guanidinium hydrogen phosphate monohydrate by Sankaranarayanan-Ramasamy method and investigation of its linear and nonlinear optical properties

A new organic nonlinear optical material isonicotinamidium picrate, with excellent nonlinear optical activity and thermal stability has been reported.

RSC Advances

A new organic NLO material isonicotinamidium picrate (ISPA): crystal structure, structural modeling and its physico-chemical properties

Author index Volume 24

Crystal growth, structural, thermal, optical and laser damage threshold studies of 8-hydroxyquinolinium hydrogen maleate single crystals

International Journal of Computer Applications

Growth, Optical and Electrical Properties of zinc tris (thiourea) sulphate (ZTS) Single Crystals

Studies on growth, spectral and mechanical properties of new organic NLO crystal: Guanidinium 4-nitrobenzoate (GuNB)

Remarkable enhancement in optical and thermal properties of sodium hydrogen phthalate hemihydrate crystals due to Fe3+ doping

Journal	Journal of Nonlinear Optical Physics & Materials
Publisher	World Scientific Pub Co Pte Lt
ISSN	0218-8635
Open Access	0