Argonne National Laboratory Center for Nanoscale Materials
An Office of Science User Facility
U.S. Department of Energy

Inhomogeneous Surface Plasmon Polaritons

charge gradient microscopy diagram

Researchers in the Center for Nanoscale Materials' Theory & Modeling and Nanophotonics groups have discovered a new way to control light. Light can be guided along the surface of a metal via a surface plasmon polariton phenomenon. When light guided along the surface of one metal encounters a different metal surface, the new type of plasmon called an "inhomogeneous surface plasmon polariton" (ISPP) results that has controlled confinement properties. ISPPs provide new ways to dynamically control the direction, speed, and confinement of optical energy and information flow at the nanoscale — key ingredients for new technologies for high-speed communications, optical storage, and advanced imaging techniques. (More...)

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