This problem, and I can not find the icon to metamaterials to recover the secret answer.

You are going to have to do a better job at restating your problem. What is it you are trying to do?

Try posting your native language, or find someone more fluent in English to help you post your question. Your own command of English is, I'm sorry to say, insufficient for your question to be understandable (or Google Translate is failing you).

Regards.