Optical characterization of periodically polarity-inverted ZnO structures on (0001) Al2O3 substrates
- Title
- Optical characterization of periodically polarity-inverted ZnO structures on (0001) Al2O3 substrates
- Author
- 박진섭
- Keywords
- Polarity; ZnO; Array; Optical properties; Extraction
- Issue Date
- 2013-09
- Publisher
- 한국물리학회
- Citation
- Current applied physics, 2013, 13(7), p.1213-1217
- Abstract
- We investigated the optical properties of periodically polarity-inverted (PPI) ZnO structures formed on (0001) Al2O3 substrates by evaluating the cathodoluminescence (CL) as a function of the acceleration voltage (Vacc). At surface regions with a low Vacc, the emission from the interface region was dominant but the dominant emission source changed to the Zn-polar regions as Vacc was increased, which can be explained by the different exciton diffusion lengths. The dependence of the emission properties on Vacc showed a slight red shift as Vacc increased and a larger red shift was observed in the Zn-polar regions.Moreover, the interface regions showed the highest intensity compared to other regions, which can be explained by the results of the geometrical analysis conducted using a finite-differential time domain simulation.
- URI
- https://www.sciencedirect.com/science/article/pii/S156717391300134X?via%3Dihubhttp://hdl.handle.net/20.500.11754/50538
- ISSN
- 1567-1739
- DOI
- 10.1016/j.cap.2013.03.013
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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