Please use this identifier to cite or link to this item: http://dl.pgu.ac.ir/handle/Hannan/77196
Title: Single-electron induced surface plasmons on a topological nanoparticle
Keywords: Multidisciplinary
Issue Date: 5-Aug-2016
27-Jun-2016
Publisher: Nature Publishing Group
Description: It is rarely the case that a single electron affects the behaviour of several hundred thousands of atoms. Here we demonstrate a phenomenon where this happens. The key role is played by topological insulators—materials that have surface states protected by time-reversal symmetry. Such states are delocalized over the surface and are immune to its imperfections in contrast to ordinary insulators. For topological insulators, the effects of these surface states will be more strongly pronounced in the case of nanoparticles. Here we show that under the influence of light a single electron in a topologically protected surface state creates a surface charge density similar to a plasmon in a metallic nanoparticle. Such an electron can act as a screening layer, which suppresses absorption inside the particle. In addition, it can couple phonons and light, giving rise to a previously unreported topological particle polariton mode. These effects may be useful in the areas of plasmonics, cavity electrodynamics and quantum information.
URI: http://dx.doi.org/10.1038/ncomms12375
Other Identifiers: 2041-1723
http://hdl.handle.net/10044/1/33378
EP/L015579/1
Type Of Material: OTHER
Appears in Collections:Physics

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