Abstract
The photoluminescence properties of a ZnO nanobelt are investigated. Both the band-edge emission and the green-yellow emission bands have a series of eigenmodes. The theoretical results demonstrate that in the band-edge emission region the photoluminescence modes are determined by the polariton modes. In the green-yellow band there is no coupling between the photons and excitons and the photoluminescence modes are determined by the transverse Fabry-Perot modes. The photoluminescence spectra at different spots confirm that the Fabry-Perot modes are determined by the transverse size. Furthermore, the fitting results show in the waveband in the ultraviolet and visible band the quality-factor Q of the cavity is decreased from 280 to 70 with the increase of the wavelength.
| Original language | English |
|---|---|
| Pages (from-to) | 11860-11868 |
| Number of pages | 9 |
| Journal | Optics Express |
| Volume | 17 |
| Issue number | 14 |
| DOIs | |
| State | Published - 6 Jul 2009 |
Keywords
- (030.4070) Modes
- (160.4236) Nanomaterials
- (300.6280) Spectroscopy, fluorescence and luminescence