William Angerer - Department of Physics and Astronomy - University ...

Chapter 8
Conclusion
In this brief chapter. we summarize our experimental results and review our conclusions
from these experiments. \Ve motivate our nonlinear optical experimental studies
as a probe of GaN and describe the relationship between the various experimental
techniques. Finally, we discuss the future of nonlinear optics as a probe of condensed
matter systems and suggest further avenues for experimentation.
The primary question that this thesis has attempted to answer is: what are the
nonlinear optical spectroscopic properties of Ga~ and how are these properties related
to the underlying physics of GaN? In other words, we were motivated to understand
the electronic and optical properties of bulk GaN and its interfaces using nonlinear
optical spectroscopy as a probe. Determination of these properties required both
experimental and theoretical investigations. These investigations included linear optical
spectroscopy, photoluminescence, nonlinear optical spectroscopy, and a theory
of ultrafast nonlinear spectroscopy of GaN.
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