Plasmonic Nanocavity Coupling
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hdl:2117/112982
Tipus de documentArticle
Data publicació2018-01-08
EditorACS
Condicions d'accésAccés obert
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continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteNANOANTENNAS - Nano-Optical Antennas for Tuneable Single Photon Super-Emitters (EC-FP7-247330)
LightNet - LightNet (EC-H2020-670949)
NANO-VISTA - Advanced photonic antenna tools for biosensing and cellular nanoimaging (EC-FP7-288263)
LightNet - LightNet (EC-H2020-670949)
NANO-VISTA - Advanced photonic antenna tools for biosensing and cellular nanoimaging (EC-FP7-288263)
Abstract
The large losses of plasmonic nanocavities, orders of magnitude beyond those of photonic dielectric
cavities, places them, perhaps surprisingly, as exceptional enhancers of single emitter light‐matter
interactions. The ultra‐confined, sub‐diffraction limited, mode volumes of plasmonic systems offer
huge coupling strengths (in the 1‐100 meV range) to single quantum emitters. Such strengths far
outshine the lower coupling strengths of dielectric microcavities, which nonetheless easily achieve
single emitter ‘strong coupling’ due to the low loss rates of dielectric cavities. In fact, it is the much
higher loss rate of plasmonic cavities that make them desirable for applications requiring bright, fastemitting
photon sources. Here we provide a simple method to reformulate lifetime measurements of
single emitters in terms of coupling strengths to allow a useful comparison of the literature of
plasmonic cavities with that of cavity‐QED, typically more closely associated with dielectric cavities.
Using this approach, we observe that the theoretical limit of coupling strength in plasmonic structures
has almost been experimentally achieved with even single molecule strong coupling now observed in
plasmonic systems. However, key problems remain to maximise the potential of plasmonic cavities,
including precise and deterministic nanopositioning of the emitter in the nanosized plasmonic mode
volumes, understanding the best geometry for the plasmonic cavity, separating useful photons from
background photons and dealing with the fluorescence quenching problems of metals. Here we
attempt to raise awareness of the benefits of plasmonic nanocavities for cavity‐QED and tackle some
of the potential pitfalls. We observe that there is increasing evidence, that using correct geometries,
and improving emitter placement abilities, significant quenching can be avoided and photon output
maximised towards the extraordinary limit provided by the high radiative rates of plasmonic
nanocavities
CitacióHugall, J. T.; Singh, A.; Hulst, N. F. V. Plasmonic Nanocavity Coupling. "ACS Photonics", 8 Gener 2018, vol. 5, núm. 1, p. 43-53.
ISSN2330-4022
Versió de l'editorhttp://pubs.acs.org/doi/10.1021/acsphotonics.7b01139
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