Surfaceroughness effects on singlescattering properties of wavelengthscale particles
Abstract
The effect of surface roughness in various size scales on the singlescattering properties of wavelengthscale particles is studied. The model simulations are carried out using the discretedipole approximation and the model particle shapes are generated using a harmonic Gaussianrandomsphere geometry. The model simulations are ensembleaveraged over a small sample of 10 model particles for each parameter combination to eliminate interference effects associated with specific model shapes. The results indicate that the effect of surface roughness on scattering cannot be considered independently of the host particle. Rather, the effectiveness of surface roughness to affect scattering depends on the particle size. The general trend for the wavelengthscale particles appears to be that a surface roughness in a given sizescale affects scattering more on large than on small particles. It is also found that a decrease in the sizescale of surface roughness clearly tends to decrease the singlescattering albedo.
 Publication:

Journal of Quantitative Spectroscopy and Radiative Transfer
 Pub Date:
 July 2007
 DOI:
 10.1016/j.jqsrt.2007.01.024
 Bibcode:
 2007JQSRT.106..389N