More on patterns in Mie scattering
2003; Elsevier BV; Volume: 226; Issue: 1-6 Linguagem: Inglês
10.1016/j.optcom.2003.08.019
ISSN1873-0310
Autores Tópico(s)Atmospheric Ozone and Climate
ResumoThe powerlaw patterns in Mie scattering (the normalized light intensity I(θ)/I(0) vs. the dimensionless qR where q=4πλ−1sinθ2 is the magnitude of the wave vector transfer at the scattering angle θ for wavelength λ, and R is the radius of the nonabsorbing sphere with a relative refractive index m>1) are analyzed using the geometrical optics approximation for particles of a large size parameter. The (qR)−4 powerlaw regime is shown to be present only in Mie scattering of soft particles. The (qR)−2 powerlaw regime occurs at the scattering angles of the p=1 geometrical ray (refracted without internal reflections) from the portion of the incident beam with an incidence angle around π/4 upon the particle. The (qR)−2 powerlaw regimes from particles sharing one common relative refractive index but differing in size parameters are collinear. Simple analytical expressions are derived to describe these powerlaw regimes of Mie scattering.
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