“On December 10, 2012 IBM announced a breakthrough optical communication technology which has been verified in a manufacturing environment. The technology – called “silicon nanophotonics” – uses light instead of electrical signals to transfer information for future computing systems, thus allowing large volumes of data to be moved fast between computer chips in servers, large data-centers, and supercomputers via pulses of light.”

http://researcher.ibm.com/researcher/view_project.php?id=2757

http://www.youtube.com/watch?v=kz_1f4BOB8Q&feature=player_detailpage