I remember reading in a popular mechanics the cover story a few years ago that we were researching designs for stealth carriers. one design was this guy it was only a concept. in the article they said stealth carriers could end up like this. it said the next carrier we build was to be a modified nimitz class with a smaller island and that it may possibly be in the center of the deck. the pic i found does not incorporate the center island but it looks smaller.
the article said it was nearly impossible to make a carrier invisible to radar but if they could make it look smaller, say the size if a fishing boat. it would force the enemy to look for the carrier amonst the hundreds of fishing vessals on the worlds oceans.
aw cool i found the article pop mechanics
i also know that the navy is experimenting with trimarain hulls and they have a carrier concept here more popular mech.