  We report in this paper a fast and accurate algorithm for computing the exact
spherical nonreflecting boundary condition (NRBC) for time-dependent Maxwell's
equations. It is essentially based on a new formulation of the NRBC, which
allows for the use of an analytic method for computing the involved inverse
Laplace transform. This tool can be generically integrated with the interior
solvers for challenging simulations of electromagnetic scattering problems. We
provide some numerical examples to show that the algorithm leads to very
accurate results.
