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Electric field induced second harmonic generation in glass.

|February 16, 2010

Summary

The electric field induced second harmonic coefficient in glass was measured. Electronic contributions were found to be larger than nuclear ones, impacting organic liquid hyperpolarizability measurements.

Area of Science:

Nonlinear optics
Materials science

Background:

The electric field induced second harmonic (EFISH) effect is a nonlinear optical phenomenon.
Understanding contributions to the EFISH coefficient in different materials is crucial for applications.

Purpose of the Study:

To measure the EFISH coefficient in glass.
To determine the relative contributions of electronic and nuclear effects.
To assess the impact of glass's third-order effect on measurements of organic liquids.

Main Methods:

Measurement of the electric field induced second harmonic coefficient in glass.

Main Results:

The nuclear contribution to the EFISH coefficient in glass is significantly smaller than the electronic contribution.

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The third-order nonlinear optical effect in glass is substantial.

Conclusions:

The electronic contribution dominates the EFISH effect in glass.
Glass's third-order nonlinear optical properties must be considered when measuring molecular hyperpolarizabilities of organic liquids.