Synthesis, growth and broadband dielectric characterization of nonlinear optical single crystal: 4-methylpyridinium5-sulfosalicylate
TL;DR: In this paper, a nonlinear optical material 4-methylpyridinium5-sulfosalicylate has been successfully synthesized, and the optical quality single crystals were grown by slow solvent evaporation solution growth technique at room temperature.
Abstract: A nonlinear optical material 4-methylpyridinium5-sulfosalicylate has been successfully synthesized, and the optical quality single crystals were grown by slow solvent evaporation solution growth technique at room temperature. The single crystal XRD analysis indicated that the crystal belongs to the monoclinic system with lattice parameters a = 7.07 A, b = 13.45 A, c = 15.57 A. The presence of various functional groups in the crystal was confirmed by FT-IR spectral analysis. The optical transmission window of the 4MSS has been identified by UV–vis–NIR studies. Broadband dielectric analysis has been studied in the frequency range 10 Hz to 20 MHz at room temperature. It is found that the real (e′) and imaginary (e″) dielectric constant, dielectric loss, dielectric modulus depend on frequency. The third order nonlinear optical properties of the grown crystals were investigated using Z-scan technique. The nonlinear index of refraction and nonlinear absorption coefficient were determined to explore the ...
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TL;DR: In this article, an amino acid derivatives, L-alanine (LA) and Bismuth nitrate-doped L-aline (BNLA) were grown by the slow evaporation technique.
7 citations
TL;DR: In this article, a detailed study on dielectric and charge transport properties of the nonlinear optical material,melaminium bis (trichloroacetate) dihydrate (MTCA), is given.
Abstract: In this report, a detailed study on dielectric and charge transport properties of the nonlinear optical material—melaminium bis (trichloroacetate) dihydrate (MTCA) is given. It is evident that there is no ferroelectric or antiferroelectric polarization in the material. It is expected to have a piezo-electric property, not a ferroelectric as the material is a non-centrosymmetric crystal. The dielectric characteristics of the specimen was carried out in a range of frequencies between 50 Hz and 5 MHz at different temperatures viz 313 K, 333 K, 353 K and 373 K. It is observed that slow down occurs at low temperatures and the hopping mechanism takes place based on localized charge carriers. The results of a complex impedance spectrum indicate that single relaxation processes occur at high frequencies. A detailed report on temperature and frequency dependence of materials’ properties of MTCA is provided in this communication.
1 citations
TL;DR: In this article , the authors investigated the dielectric and impedance spectroscopic properties of an organic product of 3-nitrophenol -2,4,6-tri amino-1,3,5- triazine (3NPTAT) single crystal, synthesized from melamine and m-nitrogen.
Abstract: This article presents the investigation of dielectric and impedance spectroscopic properties of an organic product of 3-nitrophenol -2,4,6-tri amino-1,3,5- triazine (3NPTAT) single crystal, synthesized from melamine and m-nitrophenol. Comprehensive dielectric studies and charge transportation properties of the grown 3NPTAT crystal are given. The dielectric characteristics of the specimen were carried out in the frequency range of 50 Hz and 5 MHz at different temperatures, namely, 313 K, 333 K, 353 K, and 373 K. From the spectra, it was observed that the slowdown occurs at low temperatures, and the hopping mechanism takes place based on localized charge carriers. The impedance spectroscopic results indicate that there is a single relaxation process that occurs at high frequencies. The variation detected in the material properties of 3NPTAT corresponding to the temperature and frequency has been discussed in detail.
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Book•
01 Jan 1963
TL;DR: In this paper, a sequence of procedures for identifying an unknown organic liquid using mass, NMR, IR, and UV spectroscopy is presented, along with specific examples of unknowns and their spectra.
Abstract: Presents a sequence of procedures for identifying an unknown organic liquid using mass, NMR, IR, and UV spectroscopy, along with specific examples of unknowns and their spectra,
11,753 citations
Book•
01 Jan 1991
TL;DR: A survey of second-order nonlinear optical processes and their application in optical waveguides and Fibers Device Conepts issues and future directions can be found in this article.
Abstract: Basis and Formulation of Nonlinear Optics Origin of Microscopic Nonlinearity in Organic Systems Bulk Nonlinear Optical Susceptiblity Second Order Nonlinear Optical Processes Measurement Techniques for Second-Order Nonlinear Optical Effects A Survey of Second Order Nonlinear Optical Materials Third-Order Nonlinear Optical Processes Measurement Techniques for Third-Order Effects A Survey of Third-Order Nonlinear Optical Materials Nonlinear Optics in Optical Waveguides and Fibers Device Conepts Issues and Future Directions.
2,475 citations
TL;DR: In this article, a unified theoretical treatment of the complex a.c. conductivity is given, within the pair approximation, for single electron tunnelling and hopping in both uncorrelated and strongly correlated cases, and the discussion is extended to pair processes and to atomic relaxation.
Abstract: Recent developments in the theoretical analysis and experimental study of frequency-dependent loss by relaxation in amorphous semiconductors are reviewed. A unified theoretical treatment of the complex a.c. conductivity is given, within the pair approximation, for single electron tunnelling and hopping in both uncorrelated and strongly correlated cases, and the discussion is then extended to pair processes and to atomic relaxation. The problems associated with measuring the frequency dependent conductivity of amorphous samples are considered, and relevant measurements reported for the different classes of amorphous semiconductors, tetrahedral and group V materials and chalcogenides are reviewed in the light of the available theoretical models. The similarity in the magnitudes and frequency, temperature and electric field dependences of the losses observed in many different systems at liquid helium temperatures is noted, and the possible physical reasons for this are examined.
1,025 citations
TL;DR: In this article, a semi-organic single crystal of potassium 3,5-dinitrobenzoate (KDNB) was successfully grown by slow evaporation solution (SEST) at room temperature.
Abstract: The semi-organic single crystal of potassium 3,5-dinitrobenzoate (KDNB) was successfully grown by slow evaporation solution technique (SEST) at room temperature. The lattice parameters of the grown KDNB crystal were confirmed by single crystal X-ray diffraction. The functional groups of the KDNB crystal were confirmed by Fourier transform infrared (FTIR) spectroscopy analysis. The optical quality of the grown crystal was identified by UV-Vis NIR spectral analysis. The grown crystal has good optical transparency in the range of 410–1100 nm. In the photoluminescence spectrum, sharp broad emission peaks were observed, which indicate violet and blue emission. The photoconductivity study reveals that the grown crystal has a negative photoconductive nature. The thermal behaviour of the crystal has been investigated by thermogravimetric and differential thermal analysis (TG-DTA). Vickers microhardness analysis was carried out to identify the mechanical stability of the grown crystal and the indentation size effect (ISE) was explained satisfactorily by Hays–Kendall's approach and proportional specimen resistance model [PSRM]. A chemical etching study was carried out and the etch pit density (EPD) was calculated. Laser damage threshold (LDT) energy has been measured by using a Nd:YAG laser (1064 nm). The dielectric permittivity and dielectric loss as a function of frequency were measured for the grown crystal. The solid state properties such as plasma energy, Penn gap and Fermi energy were evaluated for the KDNB crystal using the empirical relation. These estimated values were utilized to report the electronic polarizability. This matches well to the value calculated from Clausius–Mossotti relation, Lorentz–Lorentz equation, optical band gap energy and coupled dipole method (CDM). The third-order nonlinear optical properties such as refractive index (n2), absorption co-efficient (β) and susceptibility (χ(3)) were studied using Z-scan technique at 632.8 nm of He–Ne laser.
113 citations