Award Date

5-2011

Degree Type

Thesis

Degree Name

Master of Science in Physics

Department

Physics and Astronomy

First Committee Member

David P. Shelton, Chair

Second Committee Member

Victor H. S. Kwong

Third Committee Member

Stephen Lepp

Graduate Faculty Representative

Chulsung Bae

Number of Pages

38

Abstract

The second hyperpolarizability of a molecule is the microscopic version of the third order susceptibility. Direct measurements of the ratio of the second hyperpolarizability of carbon tetrachloride to diatomic nitrogen are made possible through electric field induced second harmonic generation. Whenever the dispersion of the second hyperpolarizability is not negligible, there should be deviations from Kleinman symmetry. Previous experimental data for second hyperpolarizability of this molecule have only been at two frequencies and theory predicts the zero frequency value. In order to provide for a better extrapolation to zero frequency, additional gas phase measurements of this ratio at optical frequencies are presented and discussed.

Keywords

Carbon tetrachloride; Nitrogen; Nonlinear optics; Second harmonic generation

Disciplines

Atomic, Molecular and Optical Physics | Physics

Language

English


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