Figure 5: Intensity distribution in simulation result when the period of the grating is 208.843 nm (optimized) with 90 degree laser incident angle. (a) the intensity distribution in the plane of x-y (z = 0 nm), (b) the distribution intensity with y on the line of x=0, z=0 (c) the curve of enhancement of y component of electric field in y=0 versus wavelength (d) the intensity distribution intensity with an x on the line of y=0, z=0 (e) the curve of enhancement of the x component of electric field in x=0 versus wavelength.