Formation and Optical Properties of ZnO:ZnFe2O4 Superlattice Microwires
Formation and Optical Properties of ZnO:ZnFe2O4 Superlattice Microwires
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ZnO:ZnFe2O4 超晶格微线的形成和光学性质
DOI：
10.1007/s12274-010-1036-y
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发表时间：
2010-05-01
期刊：
影响因子：
9.9
通讯作者：
Zou, Bingsuo
中科院分区：
文献类型：
--
作者：
Li, Yun;Dai, Guozhang;Zou, Bingsuo
采用简便的一步热蒸发法在密闭腔室内合成了纯ZnO六方微丝和新型矩形截面Fe（III）掺杂ZnO微丝。取向附着机制与气固生长过程相一致。Fe（III）掺杂ZnO MWs的光致发光（PL）和拉曼光谱以及原位光谱映射表明，Fe（III）沿一维（1-D）超晶格ZnO:ZnFe2O4线呈准周期性分布，而PL映射表明存在光学多空腔和相关的多模。由于一维光子晶体结构，室温下的PL光谱表现为微弱的近边双重态（376 nm和383 nm）和由强离散谱线组成的宽带（450 ~ 650 nm）。这种一维耦合光学腔材料在未来的光子和自旋电子器件中有许多应用。
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.