hi raham
Thank you for your post.
Perhaps you could have asked us:
"Anyone in the field of metamaterials and plasmonics here in the Forum?"
its not that people don't want to help, but your questions look better answered by someone already in that field.
I assume you have some background in this field, so you yourself should more or less know what they may ask about it.
Sit down and think about questions surrounding your chosen topic, so perhaps you can come up with potential questions by yourself.
Best of luck!
love satchi