Abstract

We show that the organic polyene crystal 2-{3-(4-hydroxystyryl)-5,5-dimethylcyclohex-2-enylidene}malononitrile (OH1) is a new material with excellent nonlinear optical and electro-optical properties. The principal refractive indices and the absorption constants have been determined over a broad wavelength range from 0.6to2.2μm. OH1 shows a large birefringence of Δn>0.55 and a low absorption of α<1cm1 in a large wavelength range between 800 and 1400nm. Furthermore, the nonlinear optical tensor elements d333=120±10pmV, d223=13±2pmV, and d322=8.5±2pmV have been determined by the Maker-fringe technique at the fundamental wavelength of 1.9μm. The electro-optic coefficients r333, r223, and r113 have been measured at the wavelengths of 633, 785, 1064, and 1319nm, and it is shown that the dispersion can be described by a one-oscillator model. OH1 is a promising material for nonlinear optical and electro-optical applications due to the large nonlinear coefficient d333, the large electro-optic coefficient r333=109±4pmV at 632.8nm, the favorable crystal growth properties, as well as the orthorhombic crystal symmetry (point group mm2), which renders crystal preparation and orientation much simpler than in most organic nonlinear optical crystals.

© 2008 Optical Society of America

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