Scattering of Light from Cylindrical Particles: Coupled Dipole Method Calculations and the Range of Validity of the Rayleigh-Gans-Debye Approximation
✍ Scribed by Johan Buitenhuis; Jan K.G. Dhont; Henk N.W. Lekkerkerker
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 310 KB
- Volume
- 162
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
We calculate the single particle scattering properties of cylindrical particles with the iterative version of the Coupled Dipole Method (CDM), and using these results we discuss the validity regime of the Rayleigh-Gans-Debye (RGD) theory. The CDM includes, contrary to RGD scattering, the higher order intraparticle multiple scattering contributions, which become more important when the dimensions of the rods increase and/or the refractive index difference with the solvent increases. The range of validity of the RGD approximation is assessed from the deviations from the CDM, which becomes exact in the limit of infinitely small distances between the subunits. Systematic calculations are performed for rods with a diameter smaller than one-tenth of and a length smaller than two times the wavelength of the light in the solvent, and a refractive index relative to the solvent that lies between 1 and 1.5. ⑲94 Academic Press, tnc.