Phys. Rev. Focus21, 14 (2008) – Published April 23, 2008
Ghost imaging, in which images are made using light that never came near the object, has now been demonstrated with reflected light, but the debate continues over whether the effect can be explained with classical physics.
Phys. Rev. Focus21, 5 (2008) – Published February 6, 2008
New calculations show that a material with the right electrical properties could dramatically improve the efficiency of light-like waves that travel on metal surfaces. Devices based on these waves might someday process light signals on a chip.