Dispersive Raman Effect

Compatibility:

Raman model allows another way to simulate the nonlinear phenomenon where the
nonlinear susceptibility was modeled by a second-order derivative equation which is
related to the resonant wavelength and the response time

FDTD - equations 37 - 39

where

εL is the linear relative permittivity
XNL is the nonlinear susceptibility
Ï„ is the response time
εR is Raman model permittivity
ωR is the Raman model resonant frequency

In order to simulate the Raman effect, set four parameters for Raman model: εL, εR,
τ, and ωR.