Scattering Fundamentals - Introduction to Imaging from Scattered Fields - page 41

π /Im( ), n being the refractive index. It is important to
note that the imaginary part determines the overall phase lag or advance for a
slab of N particles. Similarly, n ′ representing the absorption or the decrease in
intensity is given by

where n =12 ( N k

3

) S () 0

π / e{ }. Using these deinitions for refrac-
tive index, we can now apply this to the absorption coefficient Γ = 2 kn ′ so that
Γ(

n ′ = ( 2 Nk

3

) S () 0

4 π Nk /

2

)Re{ S () = 0 } C .

ext

ReFeRenCeS
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