Polarization

Topics

• Light Polarization

$\vec{P}=\frac{\vec{p}}{V}$

• $\vec{p}$ is the electric dipole moment

$\vec{P}=\alpha \vec{E}$

• The dipole moment $\vec{p}$ induced by an external electric field $\vec{E}$ for an atom with atomic polarizability $\alpha$
• $\alpha$ may be a tensor ${\alpha }_{ij}$

$\vec{P}={\epsilon }_0{\chi }_e\vec{E}$

• ${\chi }_e$ is Electric Susceptibility