Electric energy density in a dissipative medium by circuit analog
P. C. W. Fung, Kenneth E. Young · American Journal of Physics · 1978
In a dispersive and dissipative medium, the electric energy density is no longer given by (1/2)E⋅D. When the dielectric function is given, the electric energy density of a monochromatic wave can be calculated by considering the energy stored in an equivalent linear circuit.