Article Dans Une Revue Mechanics, Materials Science & Engineering MMSE Journal. Open Access Année : 2017

Growth, Nonlinear, Dielectric Studies on Urea Phosphoric Acid (UP) Single Crystals

Résumé

An organic nonlinear optical Urea phosphoric acid (UP) single crystal has been grown by slow evaporation solution growth technique. The cell parameters of UP single crystal were confirmed by single X-ray diffraction analysis. The presence of functional groups was identified by FT-IR spectral analysis. The UV-Vis spectral studies showed that the UP single crystal has wide transmission window in the entire visible region. The dielectric property of UP crystal revealed the normal dielectric behaviour. Mechanical strength of UP crystal was studied.The second order nonlinear coefficient of the grown crystal was also measured for UP single crystal. Introduction. In the recent scenario, an organic nonlinear optical material (NLO) is attracting a great deal of attention due to their potentially high nonlinearity and rapid response in electro-optic modulation, frequency mixing, second harmonic generation and optical parametric oscillation etc over the inorganic NLO material [1-3]. The search for nonlinear optical crystal is, in fact, the search for the " polar crystals " in which the macroscopic properties reflect the internal asymmetric relationship. The structural flexibility of organic chromophores easily modifiable through precise chemical synthesis in view to increase the molecular hyperpolarizability and the possible crafting of chirality centers are remarkable assets compared to the difficulties of the engineering route of inorganic materials, in which the requirements of non-centrosymmetry and high susceptibility have to be accounted [4,5]. Most of the organic nonlinear optical crystals which have low laser damage threshold values, less thermal stability etc., and hence these materials have been limited for device fabrication. In order to overcome these properties, a new class of organic nonlinear material crystal with high laser damage threshold value has been found. In the present investigation, growth, thermal, optical, laser damage threshold dielectric and microhardness have been carried out on the UP single crystal.

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hal-01503644 , version 1 (07-04-2017)

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N Hema, R Usha, D Shalini, V Revathi Ambika, D Jayalakshmi. Growth, Nonlinear, Dielectric Studies on Urea Phosphoric Acid (UP) Single Crystals . Mechanics, Materials Science & Engineering MMSE Journal. Open Access, 2017, 9, ⟨10.2412/mmse.77.39.252⟩. ⟨hal-01503644⟩
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