Numerical solutions of Green's integral equation for the diffrac...

In this letter, we propose a method for the numerical calculations of the femtosecond laser pulse passed through a subwavelength aperture. The time-dependent laser pulse is decomposed into a series of monochromatic simple harmonic waves.For the light field of the harmonic wave with a single frequency, the numerical calculation is made based on the solutionof the Green's integral equation set of the electromagnetic waves. Such numerical solution is iterated for all the waves withdifferent frequen