Photoluminescence eigenmodes in a single ZnO nanobelt covering the ultraviolet and visible band.
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.
Mao
Huibing
H
Key Laboratory of polar materials and devices, East China Normal University, Shanghai 200241, China. hbmao@ee.ecnu.edu.cn
Yu
Ke
K
Wang
Jiqing
J
Yu
Jianguo
J
Zhu
Ziqiang
Z
D003460:Crystallization; D008027:Light; D049449:Luminescence; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning / Q000379:methods; D015233:Models, Statistical; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D055095:Optics and Photonics; D017785:Photons; D013050:Spectrometry, Fluorescence / Q000379:methods; D013053:Spectrophotometry / Q000379:methods; D013499:Surface Properties; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
D015034:Zinc Oxide