The complex refractive index of dusty plasma

For dusty plasma, dust particle is a new component from the perspective of composition compared with common plasma. The complex refractive index, as an important parameter for studying the optical characteristic of dusty plasma, the influence of dust particles on it should be studied, mainly including the radius and number density. In this paper, the dependence of the complex refractive index on the temperature and pressure with different radius and number densities of dust particles is given. It is found that due to the existence of dust particles, the complex refractive index has a non-monotonic relation with the temperature and pressure, and the inflection points are different with different radius and number densities. In further, the possible reason which could cause the above physical phenomenon in the non-monotonic relationships is analyzed. In a word, the involved study could be supply some reference on the study of dusty plasma's optical characteristic.