Browsing all articles tagged with amplification Archives | nanotechnologies.qc.ca
Jun
2

Researchers Develop Plasmonic Amplifier

plasmonResearchers at the University of Iceland, University of Cologne and the Fraunhofer Institute Jena have demonstrated net optical amplification in a plasmonic waveguide. The results of the team, which were published in the journal Nature Photonics, represent an important breakthrough in the field of plasmonics. Optical amplification is the only feasible strategy to make light travel over sizable distances when it is bound in a plasmonic mode. Achieving such a macroscopic propagation of surface plasma waves is critical for many applications of the emerging plasmonics technology, which range from compact communication devices and optical computing to the detection and characterization of cells, virus particles or even single molecules.

A surface plasmon is a collective excitation involving all conducting electrons in a metallic layer moving relatively to the static positive ions of the metal as shown in the diagram. Research on plasmonics, a relatively new branch of optics, has received an increasing level of international attention over the last decade. This interest is mainly driven by the fact that surface plasmons, travelling along the interface between a metal and a dielectric, allow confining optical energy to volumes that are significantly smaller than those accessible with conventional dielectric waveguiding structures such as optical fibers.

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