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Revising of the Purcell effect in periodic metal-dielectric structures: the role of absorption
ITMO Univ, Russia; St Petersburg Acad Univ, Russia.
ITMO Univ, Russia.
Univ Durham, England.
Univ Durham, England.
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2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 9604Article in journal (Refereed) Published
Abstract [en]

Periodic metal-dielectric structures attract substantial interest since it was previously proposed that the spontaneous emission amplification rates (the Purcell factor) in such structures can reach enormous values up to 105. However, the role of absorption in real metals has not been thoroughly considered. We provide a theoretical analysis showing that absorption leads to diminishing values of Purcell factor. We also suggest that using emitting organic compounds such as CBP (4,4-Bis(N-carbazolyl)-1,1-biphenyl) can lead to a moderate increase of about an order of magnitude in the Purcell factor. Defining the experimentally measured Purcell factor as a ratio between the excited state lifetimes in bare CBP and in periodic structure, this increase in the fabricated periodic structure is demonstrated through a 4-8 times decrease in excited state radiative lifetime compared to a bare organic material in a wide emission spectrum.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2019. Vol. 9, article id 9604
National Category
Atom and Molecular Physics and Optics
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URN: urn:nbn:se:liu:diva-158926DOI: 10.1038/s41598-019-46071-5ISI: 000473609500030PubMedID: 31270385OAI: oai:DiVA.org:liu-158926DiVA, id: diva2:1338201
Note

Funding Agencies|Russian Science Foundation [16-12-10503]; Swedish Energy Agency

Available from: 2019-07-20 Created: 2019-07-20 Last updated: 2019-11-12

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