Figure 13: The calculated Reflectivity
Energy Loss Function
Energy loss function determines how much energy is being wasted during motion of fast-moving electrons when they incident upon a material’s surface. The frequency at which loss of energy is maximum be recognized as the plasma frequency. Form figure 14, plasma frequency is noted at resonance frequency of 13.7 eV, which indicates that loss function is maximum (with a value of 17) where absorption is found minimum.