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).
| Original language | English |
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| Title of host publication | Zinc Oxide Materials and Devices II |
| Volume | 6474 |
| DOIs | |
| Publication status | Published - 24 May 2007 |
| Externally published | Yes |
| Event | Zinc Oxide Materials and Devices II - San Jose, CA, United States Duration: 21 Jan 2007 → 24 Jan 2007 |
Conference
| Conference | Zinc Oxide Materials and Devices II |
|---|---|
| Country/Territory | United States |
| City | San Jose, CA |
| Period | 21/01/07 → 24/01/07 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering