Determination of the electrooptic coefficients of 3‐methyl 4‐nitropyridine 1‐oxide by an interferometric phase‐modulation technique

We present a method for measuring linear electrooptic coefficients involving comparative measurement of interferometric phase‐modulation indices at wavelength λ = 6328 A. The accuracy of the method (8–16%) varies according to the crystalline quality. We have investigated a new nonlinear crystal, 3‐methyl 4‐nitropyridine 1‐oxide. Our single crystals were grown from solution by an evaporation technique. We report some of their physical characteristics and the three electrooptic coefficients: ‖r41‖ = (3.6±0.6)×10−12 m/V; ‖r52‖ = (5.1±0.4)×10−12 m/V; ‖r63‖ = (2.6±0.3)×10−12 m/V. Comparison between second‐harmonic generation and electrooptic results is discussed. It is shown that the electronic contribution is preponderant and is about 35% larger than the electrooptic susceptibility. The contribution of intermediate vibrations has therefore a sign opposite to the electronic one and is about four times smaller.

[1]  Emil Wolf,et al.  Principles of Optics: Contents , 1999 .

[2]  Charles Howard Henry,et al.  Mixing of Visible and Near-Resonance Infrared Light in GaP , 1966 .

[3]  F. Robinson.  Nonlinear optical coefficients , 1967 .

[4]  The pockels effect in hexamine. , 1969, Applied optics.

[5]  J. Jerphagnon,et al.  Invariants of the Third-Rank Cartesian Tensor: Optical Nonlinear Susceptibilities , 1970 .

[6]  Ivan P. Kaminow,et al.  An introduction to electrooptic devices , 1974 .

[7]  J. Oudar,et al.  Origin of the second-order optical susceptibilities of crystalline substituted benzene , 1975 .

[8]  M. Shiro,et al.  The crystal and molecular structures of 3-methyl-4-nitropyridine N-oxide and 3,5-dimethyl-4-nitropyridine N-oxide , 1977 .

[9]  Daniel S. Chemla,et al.  Optical nonlinearities of various substituted benzene molecules in the liquid state, and comparison with solid state nonlinear susceptibilities , 1977 .

[10]  A. Carenco,et al.  Nonlinear optical properties of some m-disubstituted benzene derivatives , 1977 .

[11]  Treatment of optical propagation in crystals using projection dyadics , 1977 .

[12]  V. A. Nefedov,et al.  New nonlinear organic materials for generation of the second harmonic of neodymium laser radiation , 1977 .

[13]  J. Oudar,et al.  Optical nonlinearities of conjugated molecules. Stilbene derivatives and highly polar aromatic compounds , 1977 .

[14]  R. Hierle,et al.  An efficient organic crystal for nonlinear optics: methyl‐ (2,4‐dinitrophenyl) ‐aminopropanoate , 1977 .

[15]  D. Chemla,et al.  The description of the physical properties of condensed matter using irreducible tensors , 1978 .

[16]  J. C. Cassidy,et al.  Nonlinear optical properties of urea , 1979 .

[17]  R. T. Lynch,et al.  An organic crystal with an exceptionally large optical second‐harmonic coefficient: 2‐methyl‐4‐nitroaniline , 1979 .

[18]  C. Tang,et al.  The electro-optic coefficients of urea , 1979 .

[19]  Joseph Zyss,et al.  Demonstration of efficient nonlinear optical crystals with vanishing molecular dipole moment: Second‐harmonic generation in 3‐methyl‐4‐nitropyridine‐1‐oxide , 1981 .