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DTSTART:20170326T030000
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DTSTAMP:20260428T192948Z
UID:5888932f112bd046434644@ist.ac.at
DTSTART:20170220T110000
DTEND:20170220T130000
DESCRIPTION:Speaker: Charles A. Downing\nhosted by Mikhail Lemeshko\nAbstra
 ct: One of the primary goals of plasmonics is to confine light at subwavel
 ength scales. This aim is motivated by the desire to both transport and ma
 nipulate light over macroscopic distances. While metallic nanostructures h
 ave been proposed and widely studied to achieve such 'plasmonic circuits'\
 , both radiative and nonradiative losses inherent to metals are rather sig
 nificant. Hence\, the possible applications for energy and information tra
 nsport at the nanoscale are seemingly limited. Understanding the different
  damping mechanisms in radiatively-coupled metallic nanostructures is thus
  of paramount importance to the field of plasmonics\, from both a fundamen
 tal point of view and in order to increase the efficiency of signal transm
 ission.\n\nWe investigate the collective plasmonic modes in chains of sphe
 rical metallic nanoparticles that are coupled by near-field interactions. 
 These dipolar interactions between the nanoparticles gives rise to collect
 ive plasmons\, which are extended over the whole plasmonic lattice. We stu
 dy both a simple chain composed of regularly-spaced nanoparticles [1] and 
 a bipartite chain\, which exhibits nontrivial topological features and nov
 el excitations\, namely massive Dirac bosons [2].\n\n[1] A. Brandstetter-K
 unc\, G. Weick\, C. A. Downing\, D. Weinmann\, R. A. Jalabert\, Nonradiati
 ve limitations to plasmon propagation in chains of metallic nanoparticles\
 , Phys. Rev. B 94\, 205432 (2016)\n\n[2] C. A. Downing and G. Weick\, Topo
 logical collective plasmons in bipartite chains of metallic nanoparticles 
 (submitted to Phys. Rev. B).\n
LOCATION:Seminar room Big Ground floor / Office Bldg West (I21.EG.101)\, IS
 TA
ORGANIZER:jdeanton@ist.ac.at
SUMMARY:Charles A. Downing: Energy transport and topological aspects of col
 lective plasmons in chains of metallic nanoparticles
URL:https://talks-calendar.ista.ac.at/events/281
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