Table 3.

Maximum absolute values of I_eph from time t = 0.02 to 1 ms as a function of σ_e as computed by the EMI method.

σe (μS/μm)	$I_{\mathrm{\text{eph}}}^{\mathrm{\text{max}}}$ (nA/μm2)	${\sigma }_{\mathrm{\text{e}}}·I_{\mathrm{\text{eph}}}^{\mathrm{\text{max}}}$ (nAμS/μm3)
0.1	0.616	0.0616
0.3	0.208	0.0623
0.6	0.104	0.0625
1.5	0.042	0.0626
3.0	0.021	0.0627

We observe that ${\sigma }_{\mathrm{\text{e}}}·I_{\mathrm{\text{eph}}}^{\mathrm{\text{max}}}$ is close to constant for the different values of σ_e. The parameters used in the computations are given in Table 2.