Hi everyone recently i have performed simulation i take 5 particles which have distance more than their size (700nm) between them and i detected many azimuthal variation lobes than the usual scattering.. so can we say that due to multiple scattering of particle we can bring out the evanescent field if the distance between them is more than or equal to their size. and also please share your ideas about to bring out evanescent field.
There are two questions in your message. "i detected many azimuthal variation lobes than the usual scattering". In usual experimental conditions it is difficult to measure scattering by 5 particles because they have to be placed on some substrate, which definitely has his own scattering. From other hand, scattering only 5 particles will be rather weak, by this reason one usually measure scattering of many similar objects. If they are carefully ordered, you can see azimuth lobes you talking about, otherwise they will be averaged.
"due to multiple scattering of particle we can bring out the evanescent field if the distance between them is more than or equal to their size". This process is not related to multiple scattering and distance between particles. To answer your question, you should present your system of particles like some surface structure, which shape and dielectric properties you can decompose into Fourier series. There are components of this decomposition (diffraction gratings) that can direct evanescent field into free space. Their diffraction efficiency will give you intensity of observed scattering.
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