The first and second hyperpolarizabilities (β and γ) of eight molecules at a fundamental wavelength of 1064 were measured by gas-phase electric-field-induced second-harmonic generation (EFISH), gas-phase hyper-Rayleigh scattering (HRS), and liquid-phase HRS experiments. The EFISH measurements give accurate values of β and γ for these molecules in the gas phase, and the HRS measurements show that the effective β of these molecules in the liquid is enhanced over the gas-phase value by a factor which varies from to 2.0, over and above the Lorentz local field factors. Combining all of the measurements provides an accurate, absolute determination of the effective β for HRS in the liquid phase. The results for suitable as reference standards, are in the liquid phase and in the gas phase. Comparison of measurements between hydrogenated and deuterated molecules indicates that vibrational contributions to β are small.
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15 January 1998
Research Article|
January 15 1998
A comparison of molecular hyperpolarizabilities from gas and liquid phase measurements
Philip Kaatz;
Philip Kaatz
Department of Physics, University of Nevada Las Vegas, Las Vegas, Nevada 89154-4002
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Elizabeth A. Donley;
Elizabeth A. Donley
Department of Physics, University of Nevada Las Vegas, Las Vegas, Nevada 89154-4002
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David P. Shelton
David P. Shelton
Department of Physics, University of Nevada Las Vegas, Las Vegas, Nevada 89154-4002
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J. Chem. Phys. 108, 849–856 (1998)
Article history
Received:
August 04 1997
Accepted:
October 10 1997
Citation
Philip Kaatz, Elizabeth A. Donley, David P. Shelton; A comparison of molecular hyperpolarizabilities from gas and liquid phase measurements. J. Chem. Phys. 15 January 1998; 108 (3): 849–856. https://doi.org/10.1063/1.475448
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