  We develop a numerical scheme for solving time-domain Maxwell's equation. The
method is motivated by CIP method which uses function values and its
derivatives as unknown variables. The proposed scheme is developed by using the
Poisson formula for the wave equation. It is fully explicit space and time
integration method with higher order accuracy and CFL number being one. The
bi-cubic interpolation is used for the solution profile to attain the
resolution. It preserves sharp profiles very accurately without any smearing
and distortion due to the exact time integration and high resolution
approximation. The stability and numerical accuracy are investigated.
