Coupling of photoluminescent centers in ZnO to localized and propagating surface plasmons

Richard F. Haglund; Benjamin J. Lawrie; Richard Mu

doi:10.1016/j.tsf.2009.12.049

Coupling of photoluminescent centers in ZnO to localized and propagating surface plasmons

Richard F. Haglund, Benjamin J. Lawrie, Richard Mu

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23 Scopus citations

Abstract

The interaction of excitons and other photoluminescent centers in semiconductors with plasmons represents the coupling of the fundamental one-particle, electron-hole excitation with the fundamental many-particle excitation in metals. We describe recent photoluminescence and pump-probe experiments that illustrate both the energetics and the dynamics of this interaction, in a model material incorporating ZnO films separated from a nanostructured plasmonic metal substrate by a variable-thickness spacer layer. We find evidence for different coupling mechanisms for the band-edge exciton and donor-acceptor pair defect luminescence, and discuss the competing roles of localized surface-plasmon resonances and propagating surface-plasmon polaritons. We also present first femtosecond pump-probe lifetime measurements for the band-edge exciton with and without the presence of nearby metal nanostructures.

Original language	English
Pages (from-to)	4637-4643
Number of pages	7
Journal	Thin Solid Films
Volume	518
Issue number	16
DOIs	https://doi.org/10.1016/j.tsf.2009.12.049
State	Published - Jun 1 2010
Externally published	Yes

Funding

The authors acknowledge financial support from the National Science Foundation (IGERT graduate student fellowship NSF-DMR-0333302 and NSF-CREST HRD-0420516 ) and the Office of Science, United States Department of Energy ( DE-FG02-01ER45916 ).

Funders	Funder number
NSF-CREST	HRD-0420516
National Science Foundation	NSF-DMR-0333302
U.S. Department of Energy	DE-FG02-01ER45916
Office of Science

Keywords

Ag plasmons
Au plasmons
Exciton-plasmon coupling
Photoluminescence
Photoluminescence decay
Ultrafast pump-probe
ZnO excitons

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10.1016/j.tsf.2009.12.049

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abstract = "The interaction of excitons and other photoluminescent centers in semiconductors with plasmons represents the coupling of the fundamental one-particle, electron-hole excitation with the fundamental many-particle excitation in metals. We describe recent photoluminescence and pump-probe experiments that illustrate both the energetics and the dynamics of this interaction, in a model material incorporating ZnO films separated from a nanostructured plasmonic metal substrate by a variable-thickness spacer layer. We find evidence for different coupling mechanisms for the band-edge exciton and donor-acceptor pair defect luminescence, and discuss the competing roles of localized surface-plasmon resonances and propagating surface-plasmon polaritons. We also present first femtosecond pump-probe lifetime measurements for the band-edge exciton with and without the presence of nearby metal nanostructures.",

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AU - Lawrie, Benjamin J.

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AB - The interaction of excitons and other photoluminescent centers in semiconductors with plasmons represents the coupling of the fundamental one-particle, electron-hole excitation with the fundamental many-particle excitation in metals. We describe recent photoluminescence and pump-probe experiments that illustrate both the energetics and the dynamics of this interaction, in a model material incorporating ZnO films separated from a nanostructured plasmonic metal substrate by a variable-thickness spacer layer. We find evidence for different coupling mechanisms for the band-edge exciton and donor-acceptor pair defect luminescence, and discuss the competing roles of localized surface-plasmon resonances and propagating surface-plasmon polaritons. We also present first femtosecond pump-probe lifetime measurements for the band-edge exciton with and without the presence of nearby metal nanostructures.

KW - Ag plasmons

KW - Au plasmons

KW - Exciton-plasmon coupling

KW - Photoluminescence

KW - Photoluminescence decay

KW - Ultrafast pump-probe

KW - ZnO excitons

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EP - 4643

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Coupling of photoluminescent centers in ZnO to localized and propagating surface plasmons

Abstract

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Keywords

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