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Optics for Engineers
book

Optics for Engineers

by Charles A. DiMarzio
August 2011
Intermediate to advanced content levelIntermediate to advanced
564 pages
20h 45m
English
CRC Press
Content preview from Optics for Engineers
14
NONLINEAR OPTICS
In Chapter 6, we discussed the interaction of light with materials, using the Lorentz model
which treats the electron as a mass on a spring, as shown in Figure 6.4. The restoring force,
and the resulting acceleration in the x direction were linear as in Equation 6.26:
d
2
x
dt
2
=−E
r
e/m κ
x
x/m,
where
e is the charge on the electron
m is its mass
The restoring force, κ
x
x, is the result of a change in potential energy as the electron moves
away from the equilibrium position. The force is in fact the derivative of a potential function,
which to lowest order is parabolic. However, we know that if we stretch a spring too far, we
can observe
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Publisher Resources

ISBN: 9781439807255