March 1, 2005
A “plasmonic cover” could theoretically render objects “nearly invisible to an observer,” say University of Pennsylvania engineers.
A plasmonic screen suppresses scattering by resonating in tune with the illuminating light. Plasmons are waves of electron density, caused when the electrons on the surface of a metallic material move in rhythm. The researchers say that a shell of plasmonic material will scatter light negligibly if the light’s frequency is close… read more