期刊
NANO RESEARCH
卷 3, 期 5, 页码 326-338出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-010-1036-y
关键词
ZnO; superlattice microwire; micro-photoluminescence; micro-Raman spectroscopy
类别
资金
- National Natural Science Foundation of China (NSFC) of China [90606001, 20873039, 90406024]
Pure ZnO hexagonal microwires and Fe(III)-doped ZnO microwires (MWs) with a novel rectangular cross section were synthesized in a confined chamber by a convenient one-step thermal evaporation method. An oriented attachment mechanism is consistent with a vapor-solid growth process. Photoluminescence (PL) and Raman spectroscopy of the Fe(III)-doped ZnO MWs and in situ spectral mappings indicate a quasi-periodic distribution of Fe(III) along a one-dimensional (1-D) superlattice ZnO:ZnFe2O4 wire, while PL mapping shows the presence of optical multicavities and related multimodes. The PL spectra at room temperature show weak near-edge doublets (376 nm and 383 nm) and a broad band (450-650 nm) composed of strong discrete lines, due to a 1-D photonic crystal structure. Such a 1-D coupled optical cavity material may find many applications in future photonic and spintronic devices.
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