Título:
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Propagation and localization of quantum dot emission along a gap-plasmonic transmission line
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Autor/a:
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Castro-Lopez, M.; Manjavacas, A.; García de Abajo, Francisco Javier; Hulst, Niek F. van
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Otros autores:
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Universitat Politècnica de Catalunya. Institut de Ciències Fotòniques |
Abstract:
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Plasmonic transmission lines have great potential to serve
as direct interconnects between nanoscale light spots. The guiding of gap
plasmons in the slot between adjacent nanowire pairs provides improved
propagation of surface plasmon polaritons while keeping strong light con-
finement. Yet propagation is fundamentally limited by losses in the metal.
Here we show a workaround operation of the gap-plasmon transmission
line, exploiting both gap and external modes present in the structure.
Interference between these modes allows us to take advantage of the
larger propagation distance of the external mode while preserving the high
confinement of the gap mode, resulting in nanoscale confinement of the
optical field over a longer distance. The performance of the gap-plasmon
transmission line is probed experimentally by recording the propagation of
quantum dots luminescence over distances of more than 4 µm. We observe
a 35% increase in the effective propagation length of this multimode system
compared to the theoretical limit for a pure gap mode. The applicability of
this simple method to nanofabricated structures is theoretically confirmed
and offers a realistic way to combine longer propagation distances with
lateral plasmon confinement for far field nanoscale interconnects. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Física -Plasmons (Physics) -plasmonics -Plasmons (Física) |
Derechos:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Tipo de documento:
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Artículo - Versión publicada Artículo |
Editor:
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OSA
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Compartir:
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