Abstract
Raman scattering and photoluminescence spectra of hexagonal ZnO nanodisks were investigated. Normal Raman spectrum shows the intense E 2 modes, which confirms a typical wurtzite structure. The broadened E 2 vibration peak is due to surface/interface defect in ZnO crystal. The influence of laser irradiation heating effect on emission intensity and position has been investigated by power dependent PL and resonant Raman scattering. The threshold value of the power density for laser heating effect is 2 kW/cm 2. The shift of LO phonon vibrational peaks from RRS with excitation laser power also confirms laser irradiation heating effect. Beyond the threshold value of power density, the PL intensity and position will be affected by laser heating effect.
| Original language | English |
|---|---|
| Pages (from-to) | 5072-5076 |
| Number of pages | 5 |
| Journal | Journal of Nanoscience and Nanotechnology |
| Volume | 10 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2010 |
Keywords
- Nanodisks
- Photoluminescence
- Raman
- ZnO
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