The Gunners will meet either Sheffield United or Hull City in the final of the competition, having beaten Wigan Athletic on penalties at Wembley on Saturday.
The North Londoners have not won a trophy since 2005 - an FA Cup penalty shootout victory over Manchester United - and the Spaniard is confident that his teammates will not waste the opportunity they have in front of them.
"We've got an unbelievable opportunity," he told the club's official website.
"We've got the hunger and I think we've got everything we need to do it. We don't want to waste that opportunity and we're going to do it now."
The final is scheduled to take place on May 17.