![]() ![]() Where, ( E 0)is the incident electric field vector and If a plane wave of frequency ( f) propagates through a solid with velocity ( v) in a direction defined by ( x), the electric field ( E) is described by the following progressive wave equation: The optical properties of the solid are therefore governed by the interaction between the solid and the electric field of the electromagnetic wave. The velocity of propagation of a electromagnetic wave through a solid is given by the frequency-dependent complex refractive index N = n - ik where the real part, n is related to the velocity, and k, the extinction coefficient is related to the decay, or damping of the oscillation amplitude of the incident electric field. Absorption and extinction coefficient theory ![]()
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February 2023
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