$negfpolaropticalphonon

If you use the command $negfifscattering and the second term is 1, then use the command $negfpolaropticalphonon to setup the related parameters of polar optical phonon scattering of GaAs.
The equation of polar optical phonon scattering:

$W_{pop}^{ab}(k)=\frac{|C{|}^{2}V}{4{\pi }^2{\hslash }^2}[n({\omega }_0)]N_{1D}(E_k+\hslash {\omega }_0)$

$W_{pop}^{em}(k)=\frac{|C{|}^{2}V}{4{\pi }^2{\hslash }^2}[n({\omega }_0+1)]N_{1D}(E_k-\hslash {\omega }_0)$

$C=i\sqrt{\frac{e^2\hslash {\omega }_0}{2{ϵ}_{0}V}(\frac{1}{{ϵ}_{\mathrm{\infty }}}-\frac{1}{{ϵ}_s})}$

Example:

$negfpolaropticalphonon
$\rho$  ${ϵ}_{\mathrm{\infty }}$  ${ϵ}_s$
$D_{op}$ ${\omega }_0$

$negfpolaropticalphonon
5320.0 10.92 13.2
1.60e-8 5.18e13
# rho epsilon_inf epsilon_s
# D0 w0