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Proceedings Paper

Surface plasmon mediated emission from metal/ZnO: an example for the fabrication of high brightness top-emitting light emitting diodes
Author(s): H. C. Ong; D. Y. Lei; J. Li
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Paper Abstract

In this study, we have attempted to enhance the forward emission from metal-capped ZnO mediated by surface plasmon (SP) cross coupling. By using metal alloys and dielectric grating, it is proposed that energy from ZnO can be resonantly coupled to metal/ZnO SPs, transferred to metal/grating SPs and then Bragg scattered to the free space. Although the experimental conditions are not yet been optimized, preliminary results from Al (30 nm) capped ZnO thin film show the forward/backward emission intensity ratio can be increased from 0.1 to 0.6 after the introduction of dielectric grating with periodicity of ~ 800nm on metal side. The ratio is compared favorably with the bare ZnO emission ratio of 0.5. It is thus believed SP cross coupling can be used for fabricating high brightness top-emitting light emitting diodes (LEDs).

Paper Details

Date Published: 20 February 2007
PDF: 10 pages
Proc. SPIE 6474, Zinc Oxide Materials and Devices II, 64740V (20 February 2007); doi: 10.1117/12.713695
Show Author Affiliations
H. C. Ong, The Chinese Univ. of Hong Kong (Hong Kong China)
D. Y. Lei, The Chinese Univ. of Hong Kong (Hong Kong China)
J. Li, The Chinese Univ. of Hong Kong (Hong Kong China)


Published in SPIE Proceedings Vol. 6474:
Zinc Oxide Materials and Devices II
Ferechteh Hosseini Teherani; Cole W. Litton, Editor(s)

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