  This paper begins with a brief history of nonlinear optics and how the bond
model emerges as a need to obtain a better physical picture of nonlinearity. A
description about the possible application of the bond model is presented
afterward followed by a theoretical explanation of its fundamentals. The
possibility to develop this model for future application such as surface
reconstruction characterization, real time surface biosensor monitoring, and
semiconductor surface bandgap determination is also presented at the end.
