Revising of the Purcell effect in periodic metal-dielectric structures: the role of absorption

Morozov, Konstantin M.; Ivanov, Konstantin A.; de Sa Pereira, Daniel; Menelaou, Christopher; Monkman, Andrew P.; Pozina, Galia; Kaliteevski, Mikhail A.

Abstract

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.

Citation

Morozov, K. M., Ivanov, K. A., de Sa Pereira, D., Menelaou, C., Monkman, A. P., Pozina, G., & Kaliteevski, M. A. (2019). Revising of the Purcell effect in periodic metal-dielectric structures: the role of absorption. Scientific Reports, 9(1), Article 9604. https://doi.org/10.1038/s41598-019-46071-5

• Journal Article Type: Article
• Acceptance Date: Jun 18, 2019
• Online Publication Date: Jul 3, 2019
• Publication Date: 2019
• Deposit Date: Jul 17, 2019
• Publicly Available Date: Jul 17, 2019
• Journal: Scientific Reports
• Electronic ISSN: 2045-2322
• Publisher: Nature Research
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 1
• Article Number: 9604
• DOI: https://doi.org/10.1038/s41598-019-46071-5
• Public URL: https://durham-repository.worktribe.com/output/1297109