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Conference Paper: Enhanced efficiency of a fluorescing nanoparticle with a silver shell

TitleEnhanced efficiency of a fluorescing nanoparticle with a silver shell
Authors
Issue Date2009
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/conf
Citation
Journal Of Physics: Conference Series, 2009, v. 188 How to Cite?
AbstractSpontaneous emission (SE) rate and the fluorescence efficiency of a bare fluorescing nanoparticle (NP) and the NP with a silver nanoshell are analyzed rigorously by using a classical electromagnetic approach with the consideration of the nonlocal effect of the silver nano-shell. The dependences of the SE rate and the fluorescence efficiency on the core-shell structure are carefully studied and the physical interpretations of the results are addressed. The results show that the SE rate of a bare NP is much slower than that in the infinite medium by almost an order of magnitude and consequently the fluorescence efficiency is usually low. However, by encapsulating the NP with a silver shell, highly efficient fluorescence can be achieved as a result of a large Purcell enhancement and high out-coupling efficiency (OQE) for a well-designed core-shell structure. We also show that a higher SE rate may not offer a larger fluorescence efficiency since the fluorescence efficiency not only depends on the internal quantum yield but also the OQE. © 2009 IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/158616
ISSN
2015 SCImago Journal Rankings: 0.211
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChoy, WCHen_US
dc.contributor.authorChen, XWen_US
dc.contributor.authorHe, Sen_US
dc.date.accessioned2012-08-08T09:00:30Z-
dc.date.available2012-08-08T09:00:30Z-
dc.date.issued2009en_US
dc.identifier.citationJournal Of Physics: Conference Series, 2009, v. 188en_US
dc.identifier.issn1742-6588en_US
dc.identifier.urihttp://hdl.handle.net/10722/158616-
dc.description.abstractSpontaneous emission (SE) rate and the fluorescence efficiency of a bare fluorescing nanoparticle (NP) and the NP with a silver nanoshell are analyzed rigorously by using a classical electromagnetic approach with the consideration of the nonlocal effect of the silver nano-shell. The dependences of the SE rate and the fluorescence efficiency on the core-shell structure are carefully studied and the physical interpretations of the results are addressed. The results show that the SE rate of a bare NP is much slower than that in the infinite medium by almost an order of magnitude and consequently the fluorescence efficiency is usually low. However, by encapsulating the NP with a silver shell, highly efficient fluorescence can be achieved as a result of a large Purcell enhancement and high out-coupling efficiency (OQE) for a well-designed core-shell structure. We also show that a higher SE rate may not offer a larger fluorescence efficiency since the fluorescence efficiency not only depends on the internal quantum yield but also the OQE. © 2009 IOP Publishing Ltd.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/confen_US
dc.relation.ispartofJournal of Physics: Conference Seriesen_US
dc.titleEnhanced efficiency of a fluorescing nanoparticle with a silver shellen_US
dc.typeConference_Paperen_US
dc.identifier.emailChoy, WCH:chchoy@eee.hku.hken_US
dc.identifier.authorityChoy, WCH=rp00218en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/1742-6596/188/1/012055en_US
dc.identifier.scopuseid_2-s2.0-73349105274en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-73349105274&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume188en_US
dc.identifier.isiWOS:000280341500055-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridChoy, WCH=7006202371en_US
dc.identifier.scopusauthoridChen, XW=10139115100en_US
dc.identifier.scopusauthoridHe, S=36048024500en_US

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