+\section{Optical Reflection Spectroscopy using the VASE}
+
+\subsection{Au on Si}
+
+\begin{figure}[H]
+ \centering
+ \includegraphics[width=0.8\textwidth]{figures/ellipsometer/au_and_blackau/au_on_si.png}
+ \caption{figure}{Reflection measurements for Au layers on Si}
+\end{figure}
+
+
+\subsection{Au on Au-Black on Au on Si}
+\begin{figure}[H]
+ \centering
+ \includegraphics[width=0.8\textwidth]{figures/ellipsometer/au_and_blackau/au_on_blackau_si.png}
+ \caption{figure}{Reflection measurements for an Au layer on Au-Black on Au layers on Si}
+\end{figure}
+
+\subsection{Comparison with model of 50nm Au on Si}
+
+\begin{figure}[H]
+ \centering
+ \includegraphics[width=0.8\textwidth]{figures/ellipsometer/au_and_blackau/generated_au_on_si_reflection.png}
+ \caption{Generated 50nm on Si}
+\end{figure}
+
+Peaks