Light propagation

Figure 6-4. Qualitative energy level diagram of the 1 Bu excinm band structure of T<, at A =0 derived by the Ewald dipole-dipole sums for excitation light propagating along the a crystal axis.

The requirement that x x = xlixll is the mathematical statement that light propagates with the same speed with respect to both 0 and O, if they are equivalent observers. In (9-8) the transformation coefficients A"v are all real. The condition (9-10) requires that... 

Step-Index Multimode. The step-index multimode fiber has a sharp difference between the index of refraction of the core and that of the cladding (Fig. 16.8a). Light propagation in such a fiber is... 

Figure 16.9. Light propagation in a mnltimode step-index fiber.

Fig. 9.1. Principle of total internal reflection. Light propagation and refraction in a system with different refractive indices separated with a smooth surface is shown. Left The incident light is entering from the high refractive index medium under an angle 61 which is less than the critical angle 0C. Right total internal reflection because the incident light angle 61 is larger than 6C.

Let us investigate light propagation in a planar waveguide consisting of three media with the refractive indices i < n2> 3 and a waveguide layer thickness d (Figure 2). 

We shall assume light propagation along z-axis and electromagnetic field distribution independent of y coordinate. Solution of Maxwell s equations for such a structure can be assumed in the form ... 

Nonintuitive Light Propagation Effects In Third-Order Experiments. One of the first tasks for a chemist desiring to quantify second- and third-order optical nonlinear polarizability is to gain an appreciation of the quantitative manifestations of macroscopic optical nonlinearity. As will be shown this has been a problem as well for established workers in the field. We will present pictures which hopefully will make these situations more physically obvious. 

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