Extinction properties of spherical hollow particles in visible wavelength range

According to the Aden-Kerker theory,the scattering properties of spherical hollow particles were studied.By using Matlab program,the visible extinction performance of spherical hollow particles was numerically simulated and the influences of outer refractive index,scale parameter and wall thickness on extinction performance were studied.The results showed that with the increase of outer relative refractive index,the extinction performance firstly decreased and then increased;with the increase of particle size parameter,the extinction coefficient presented up and down shocks with a series of maximum and minimum values,and then the amplitudes weakened and fluctuated near the number 2;and with the decrease of wall thickness,the extinction coefficient firstly increased and then decreased.In practice,different combinations of particle diameter and wall thickness can be used to achieve a specific extinction effect,and generally the hollow particle outperforms the solid particle in extinction performance.