Naslov
Effects of plasmon energetics on light emission induced by scanning tunneling microscopy

Autori
Miwa, K. ; Sakaue, M. ; Gumhalter, Branko ; Kasai, H.

Izvornik
Journal of Physics, Condensed Matter (0953-8984) 26 (2014); 222001-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
luminescence iduced by STM; nanophotonics; nonequilibrium Green's functions

Sažetak
A theoretical model of plasmon and molecular luminescence induced by scanning tunneling microscopy using a molecule-covered tip on clean metal surfaces is developed. The effects of coupling between molecular exciton and interface plasmon on the luminescence spectra are investigated for variable energy of plasmon modes by means of the nonequilibrium Green's function method. It is found that spectral features arising from interference between the processes of energy absorption by the molecule and interface plasmons appear near the energy of the excitonic mode. For the energy of plasmon above (below) the energy of excitonic mode, an additional peak structure appears in the energy range slightly below (above) the energy of the excitonic mode. Prominent peak and dip structures observed in recent luminescence experiments are interpreted by the developed theory whereby its utility in the fields of plasmonics and nanophotonics is demonstrated.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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