Abstract
Boundary condition for the finite-difference-time-domain (FDTD) photonic
simulation truncated with a gain medium is studied. Reflection occurs when
applying the perfectly matched layer (PML) due to the impedance mismatch.
The implementation of PML for the simulation truncated with gain medium is
presented including both the un-split and split-field formulation, respectively.
Numerical validation through simulating the light propagating in an active
semiconductor waveguide containing gain medium indicates that the boundary
formulation derived can effectively absorb the out-going light under different
carrier densities.
© 2011 IEEE
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