1-0 d=45 0-6 )( 0 d=9 Figure 11. Surface plasmon reso- nance for silver coated grating. Rpe is the relative reflectivity for p-polarized incident and reflected s-polarized radiation. (a)Rop for 00+ 中=0,(b) R for中=45,(c) R,for 15161718192021 Angle/deg. d( dR for中=90.For Angle/deg p=45 both polarizations can couple qually well to the plasmon. A=5()nm o s conve A=7(I nm as a A=750 nm with this grating pitch on increasing A=8 nm the wavelength the maximum conver sion occurs. at smaller angles of