Polarized Raman scattering of single ZnO nanorod

Journal Article · Tue Jan 21 04:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4861874· OSTI ID:22275776

Wang, Y. Z.; Cheng, S. Y. ^[1]; Chen, Y. H. ^[2]

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1. Institute of Micro/Nano Devices and Solar Cells, School of Physics and Information Engineering, Fuzhou University, Fuzhou (China)
2. Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083 (China)

Polarized Raman scattering measurement on single wurtzite c-plane (001) ZnO nanorod grown by hydrothermal method has been performed at room temperature. The polarization dependence of the intensity of the Raman scattering for the phonon modes A{sub 1}(TO), E{sub 1}(TO), and E{sub 2}{sup high} in the ZnO nanorod are obtained. The deviations of polarization-dependent Raman spectroscopy from the prediction of Raman selection rules are observed, which can be attributed to the structure defects in the ZnO nanorod as confirmed by the comparison of the transmission electron microscopy, photoluminescence spectra as well as the polarization dependent Raman signal of the annealed and unannealed ZnO nanorod. The Raman tensor elements of A{sub 1}(TO) and E{sub 1}(TO) phonon modes normalized to that of the E{sub 2}{sup high} phonon mode are |a/d|=0.32±0.01, |b/d|=0.49±0.02, and |c/d|=0.23±0.01 for the unannealed ZnO nanorod, and |a/d|=0.33±0.01, |b/d|=0.45±0.01, and |c/d|=0.20±0.01 for the annealed ZnO nanorod, which shows strong anisotropy compared to that of bulk ZnO epilayer.

• OSTI ID: 22275776
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 3 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ANISOTROPY
ANNEALING
COMPARATIVE EVALUATIONS
EMISSION SPECTRA
HYDROTHERMAL SYNTHESIS
NANOSTRUCTURES
PHONONS
PHOTOLUMINESCENCE
POLARIZATION
RAMAN SPECTRA
RAMAN SPECTROSCOPY
SELECTION RULES
TEMPERATURE RANGE 0273-0400 K
TENSORS
TRANSMISSION ELECTRON MICROSCOPY
ZINC OXIDES