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New General Science Study Findings Recently Were Reported by Researchers at Aalborg University (Extremely confined gap surface-plasmon modes excited...

August 15, 2014



New General Science Study Findings Recently Were Reported by Researchers at Aalborg University (Extremely confined gap surface-plasmon modes excited by electrons)

By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Science. According to news reporting originating in Aalborg, Denmark, by NewsRx journalists, research stated, "High-spatial and energy resolution electron energy-loss spectroscopy (EELS) can be used for detailed characterization of localized and propagating surface-plasmon excitations in metal nanostructures, giving insight into fundamental physical phenomena and various plasmonic effects. Here, applying EELS to ultra-sharp convex grooves in gold, we directly probe extremely confined gap surface-plasmon (GSP) modes excited by swift electrons in nanometre-wide gaps."

The news reporters obtained a quote from the research from Aalborg University, "We reveal the resonance behaviour associated with the excitation of the antisymmetric GSP mode for extremely small gap widths, down to similar to 5 nm. We argue that excitation of this mode, featuring very strong absorption, has a crucial role in experimental realizations of non-resonant light absorption by ultra-sharp convex grooves with fabrication-induced asymmetry."

According to the news reporters, the research concluded: "The occurrence of the antisymmetric GSP mode along with the fundamental GSP mode exploited in plasmonic waveguides with extreme light confinement is a very important factor that should be taken into account in the design of nanoplasmonic circuits and devices."

For more information on this research see: Extremely confined gap surface-plasmon modes excited by electrons. Nature Communications, 2014;5():14-20. Nature Communications can be contacted at: Nature Publishing Group, Macmillan Building, 4 Crinan St, London N1 9XW, England. (Nature Publishing Group - www.nature.com/; Nature Communications - www.nature.com/ncomms/)

Our news correspondents report that additional information may be obtained by contacting S. Raza, Aalborg Univ, Dept. of Phys & Nanotechnol, DK-9220 Aalborg, Denmark. Additional authors for this research include N. Stenger, A. Pors, T. Holmgaard, S. Kadkhodazadeh, J.B. Wagner, K. Pedersen, M. Wubs, S.I. Bozhevolnyi and N.A. Mortensen (see also Science).

Keywords for this news article include: Europe, Aalborg, Denmark, Science

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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