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The dependent scattering mechanism is known to have a significant impact onthe radiative properties of random media containing discrete scatterers. Herewe theoretically demonstrate the role of dependent scattering on the radiativeproperties of disordered media composed of nonabsorbing, dual-dipolarparticles. Based on our theoretical formulas for the radiative properties forsuch media, we investigate the dependent scattering effects, including theeffect of modification of the electric and magnetic dipole excitations and thefar-field interference effect, both induced and influenced by the structuralcorrelations. We study in detail how the structural correlations play a role inthe dependent scattering mechanism by using two types of particle system, i.e.,the hard-sphere system and the sticky-hard-sphere system. We show that theinverse stickiness parameter, which controls the interparticle adhesive forceand thus the particle correlations, can tune the radiative propertiessignificantly. Particularly, increasing the surface stickiness can result in ahigher scattering coefficient and a larger asymmetry factor. The results alsoimply that in the present system, the far-field interference effect plays adominant role in the radiative properties while the effect of modification ofthe electric and magnetic dipole excitations is more subtle. Our study ispromising in understanding and manipulating the radiative properties ofdual-dipolar random media.

Structural correlations and dependent scattering mechanism on the radiative properties of random media