We report the growth and nonlinear optical properties of cyclohexylammonium acetate (CYHAC) crystal. The functional groups and crystal structure were determined using FT-IR analyses and single crystal XRD (293 K). UV–Vis–NIR measures the cutoff wavelength (254 nm) and optical band gap (5.17 eV) of CYHAC crystal. TG-DSC spectrum shows the melting point (161 °C) and decomposition of the compound. Activation energy was calculated from dielectric studies as a function of frequency at different temperatures. Laser damage threshold of CYHAC is 5.23 GW/cm2. Nonlinear optical parameters were calculated using Z-Scan technique for this material and its optical limiting behavior were also tested, the value of limiting threshold and clamping output are 24.3 mW and 7.1 mW respectively. © 2017 Elsevier B.V.

Gomathi S

Department of General Management

VIT Business School

Vellore Campus

Madeswaran S

Department of Physics

School of Advanced Sciences

Babu D.R

Aravindan G.

Fulltext

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

Materials Letters

The 2-amino-5-bromopyridinium trifluoroacetate (2A5BPTFA) crystal has been successfully grown by solvent slow evaporation technique. The grown crystal is found to non-centrosymmetric space group Pna21 with orthorhombic crystal system, which has been confirmed from single crystal X-ray diffraction analysis. The crystalline nature of the 2A5BPTFA is supported by powder X-ray diffraction technique. The molecular structure and different functional groups in 2A5BPTFA were confirmed by 1H, 13C NMR and FTIR spectral analyses. The intermolecular charge transfer that occurs in 2A5BPTFA molecule due to the presence of N–H⋯O and C–H⋯O hydrogen bondings have been studied by Hirshfeld surface analysis. From the UV–Vis absorption and photoluminescence spectra, the lower cutoff wavelength and emission peak are found to be 364 nm and 392 nm, respectively. In addition, the optical band gap of grown crystal has been calculated as 3.47 eV. Powder second harmonic generation efficiency of the crystal is observed to be 2.44 times greater than that of potassium dihydrogen phosphate. A positive photoconducting nature and low dielectric constant values have been obtained from photoconductivity and dielectric studies. From the Z-scan study reveals the self-defocusing nature of the grown crystal. Optical limiting study shows the optical limiting response of 2A5BPTFA crystal. In addition, the intermolecular charge transfer interactions and existence of N–H⋯O hydrogen bonding of the 2A5BPTFA have been confirmed by density functional theory methods and are discussed in detail. © 2019 Elsevier Ltd

Journal of Physics and Chemistry of Solids

Experimental and quantum chemical studies on SHG, Z-scan and optical limiting investigation of 2-amino-5-bromopyridinium trifluoroacetate single crystal for optoelectronic applications

Urea p-nitrophenol, an organic nonlinear optical crystal was synthesized and grown adopting slow evaporation and seed rotation method. Single crystal X-ray diffraction study confirmed the formation of the desired crystal. High resolution X-ray diffraction study showed the defect nature of the crystal. The presence of functional groups in the material was confirmed by FTIR analysis. UV-Vis-NIR study indicates that the grown crystal has a wider transparency region with the lower cutoff wavelength at 423 nm. The grown crystal is thermally stable up to 120 °C as assessed by TG-DTA analysis. The optical homogeneity of the grown crystal was confirmed by birefringence study. The 1064 nm Nd-YAG laser was used to obtain laser induced surface damage threshold which was found to be 0.38, 0.25 and 0.33 GW/cm2 for (0 1 0), (1 1 − 1) and (0 1 1) planes, respectively. The dielectric study was performed to find the charge distribution inside the crystal. The hardness property of the titular material has been found using Vicker’s microhardness study. The optical nonlinearity obtained from third order nonlinear optical measurements carried out using Z-scan technique showed that these samples could be exploited for optical limiting studies. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

Applied Physics A

Growth and characterizaion of urea p-nitrophenol crystal: an organic nonlinear optical material for optoelectronic device application

Single crystal of cyclohexylammonium hydrogen adipate (CYHAD) was grown from slow evaporation solution growth technique. The crystal structure and lattice parameters were determined by single crystal X-ray diffraction analysis. The material crystallized in monoclinic crystal system (P21/c). The FT-IR and CHN analysis were used to conform the functional group present in CYHAD. The material has high transparency with negligible absorption in the entire visible region and the optical band gap was found to be 4.90 eV. The PL spectrum shows the blue emission of CYHAD. The CYHAD crystal was stable up to 168.01 °C and the laser damage threshold of CYHAD was 9.74 GW/cm2. Electrical properties were studied using LCR impedance analyzer. The third order nonlinear properties (n2=-5.124 × 10−8 cm2/W, β = 0.024 × 10−4 cm/W and χ3 = 2.443 × 10−6 esu) were calculated using 532 nm diode pumped CW Nd:YAG Laser and optical limiting behavior endorse that the CYHAD material is favorable for optoelectronic applications. © 2018 Elsevier B.V.

Materials Chemistry and Physics

Structural, thermal and nonlinear optical studies on novel organic cyclohexylammonium hydrogen adipate crystal

Organic bulk single crystal of cyclohexylaminium hydrogen phthalate hemihydrate (CYHPH) was grown by slow cooling method using methanol as a solvent. The grown crystal belongs to orthorhombic system with Pbcn space group and it has various functional groups such as NH3 +, phthalate and a water molecule. The cut off wavelength of CYHPH was found at 307 nm. Thermal analysis affirmed that the CYHPH compound was stable up to 146 °C and completely decomposed at 263 °C. The activation energy at 100 Hz, 1 and 10 KHz was found to be 0.31, 0.141 and 0.142 eV respectively. The grown CYHPH crystal exhibits third order nonlinear optical behavior. © 2017, Springer Science+Business Media New York.

Journal of Materials Science: Materials in Electronics

Growth and characterization of cyclohexylaminium hydrogen phthalate hemihydrate nonlinear optical single crystals

The new organic nonlinear optical material piperazinium (bis) hydrogen succinate single crystal (PPHS) was synthesized by the slow evaporation method. The solubility of PPHS was determined by gravimetric analysis and the metastable zonewidth was assessed by polythermal method. The induction period was measured by isothermal method. The experimentally calculated values of the interfacial energies are in agreement with the theoretical values. As an outcome of studying the nucleation parameters, a bulk single crystal of PPHS was grown by slow cooling method. The structure of PPHS was estimated from single crystal X-ray diffraction analysis. FT NMR spectrum was analyzed. The cut - off wavelength and energy band gap values were found to be 254 nm and 4.85 eV respectively from the UV–vis–NIR spectrum analysis. The thermal stability of the grown crystal was studied. The mechanical strength and third order nonlinear optical susceptibility of the grown crystal were measured by Vicker's microhardness test and Z-scan technique respectively. © 2016 Elsevier B.V.

Journal	Data powered by TypesetMaterials Letters
Publisher	Data powered by TypesetElsevier BV
ISSN	0167-577X
Open Access	No