Picosecond measurement of the nonlinear refractive index of new salts of carboxylate anions with chiral ammonium cations

Abstract:

The third order nonlinear optical properties of novel carboxylate anions with chiral amines and ammonium cations have been studied by a new alternative of the classical z-scan technique with picosecond laser pulses (pulse duration of 30 ps at 1064nm wavelength). The materials do not present linear and nonlinear (two-photon) absorptions at the wavelength and the intensities used for the experiments. The non-resonant molecular second order hyperpolarizability γ obtained can reach 4.4 × 10-48 SI. These values are two and three orders of magnitude larger than those CS2 and of C 6H6 respectively. © 2004 Elsevier B.V. All rights reserved.

Año de publicación:

2004

Keywords:

• Z-scan technique
• Third-order nonlinearly
• Molecular second-order hyperpolarizability
• Nonlinear refraction index
• Picosecond laser pulses
• Organic ionic compounds

Fuente:

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scopus