Thanks Aurelien for your reply.
the problem is that it doesn’t give a constant reflection,but with variations between 0.3 and 0.34 probably due to interference. so I was trying to get a more smoother reflection ,coz I plan to add metal nanoparticles on this subs and the plasmoinc effect is not as clear as it should be coz of this reflection interference. I am trying hard to find best APML no. of layers to minimize this.
I hope you got my question.
waiting for reply.
Perveen.