Propagation of Electric Dipole Radiation through a Medium

Figure 6

Shown are field lines of the Poynting vector for a dipole oscillating along the 𝑧 axis. The parameters are 𝜀_𝑟=1.7+0.06𝑖 and 𝜇_𝑟=1, which are the values for water at 3 μm. The index of refraction is 𝑛=1.3+0.023𝑖.