S-Space College of Natural Sciences (자연과학대학) Dept. of Physics and Astronomy (물리·천문학부) Physics (물리학전공) Journal Papers (저널논문_물리학전공)
Cathodoluminescence of single ZnO nanorod heterostructures
- Piechal, Bernard; Yoo, Jinkyung; Elshaer, Abdelhamid; Mofor, Augustine Che; Yi, Gyu-Chul; Bakin, Andrey; Waag, Andreas; Donatini, Fabrice; Dang, Le Si
- Issue Date
- phys. stat. sol. (b) 244, 1458 (2007)
- Optical properties of ZnO-based single nanorods are probed by cathodoluminescence (CL) measurements at T=5 K. We observe a variation of the ZnO near band edge CL by three orders of magnitude along the nanorod axis, accompanied by a spectral blueshift of 10-30 meV. This indicates a rather poor structural quality of the nanorod bottom part, close to the substrate. ZnO/ZnMgO quantum wells grown on top of ZnO nanorods are found to exhibit much stronger confinement effects as compared to their two-dimensional counterparts, suggesting a reduced spontaneous and piezoelectric polarization effects.
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