Journal ArticleDOI
Quadratic nonlinear-optical properties of a new transparent and highly efficient organic–inorganic crystal: 2-amino-5-nitropyridinium-dihydrogen phosphate (2A5NPDP)
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In this paper, 2-amino-5-nitro-pyridinium-dihydrogen phosphate (2A5NPDP) was designed to display high NLO efficiency by incorporating highly polarizable organic molecules arranged in a polar order between phosphate polyanion sheets.Abstract:
Linear and quadratic nonlinear-optical (NLO) properties of a new organic–inorganic crystal, 2-amino-5-nitro-pyridinium-dihydrogen phosphate (2A5NPDP), are reported. 2A5NPDP was designed to display high NLO efficiency by incorporating highly polarizable organic molecules arranged in a polar order between phosphate polyanion sheets. The material is transparent in the visible and the near-IR (from 0.42 to 2 μm) with favorable phase-matching (PM) conditions for second-harmonic generation in the 1-μm region. Crystal nonlinear coefficients responsible for PM were determined by the Maker fringe method, leading at 1.06 μm to d15 ≅ 7.2 pm/V and d24 ≅ 1.3 pm/V. The measured crystal coefficients significantly depart from oriented gas model calculations based on molecular hyperpolarizability values measured in an aprotic solution, thus suggesting important crystal-field effects and protonation contributions. Thermal sensitivity of the PM angle at 1.34 μm is found to be 155″/°C, which is considerably larger than typical values of inorganic NLO crystals and opens the way to efficient thermal tuning of phase-matched processes.read more
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References
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TL;DR: In this paper, the influence of donor and acceptor substituents on the second and third order hyperpolarizabilities β and γ of large conjugated molecules such as stilbene and styrene derivatives was investigated.
Journal ArticleDOI
Maker Fringes: A Detailed Comparison of Theory and Experiment for Isotropic and Uniaxial Crystals
J. Jerphagnon,S. K. Kurtz +1 more
TL;DR: In this article, a complete theory of Maker fringes in nonabsorbing isotropic and uniaxial crystals has been derived which includes all the corrections necessary for making precise determinations of nonlinear optical co-efficients.
Journal ArticleDOI
Synthesis of Organic Salts with Large Second-Order Optical Nonlinearities
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Optical, mechanical, and thermal properties of barium borate
TL;DR: In this paper, Chen et al. report measurements of all the material constants necessary to fully characterize barium borate as a nonlinear optical material, including the crystal structure, the optical absorption, the refractive indices from the UV to the near IR, the thermo-optic coefficients, the non-linear optical or coefficients, resistance to laser damage, the elastic constants, the thermal expansion, thermal conductivity and dielectric constants, and the fracture toughness.
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TL;DR: In this article, an analysis of macroscopic optical nonlinearity coefficients of molecular units is presented, in the absence of significant intermolecular effects, as the tensorial sum of molecular hyperpolarizabilities.
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