Fabry-Pérot microcavity modes observed in the micro-photoluminescence spectra of the single nanowire with InGaAs/GaAs heterostructure.
Fabry-Pérot microcavity modes observed in the micro-photoluminescence spectra of the single nanowire with InGaAs/GaAs heterostructure.
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DOI：
10.1364/oe.17.009337
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发表时间：
2009-05
期刊：
影响因子：
3.8
通讯作者：
Lin Yang;J. Motohisa;T. Fukui;L. Jia;Lei Zhang;M. Geng;Ping Chen;Yu Liu
中科院分区：
文献类型：
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作者：
Lin Yang;J. Motohisa;T. Fukui;L. Jia;Lei Zhang;M. Geng;Ping Chen;Yu Liu
本文报道了用选择区域金属有机物气相外延技术在GaAs（111）B衬底上制备InGaAs/GaAs异质结构纳米线。在具有分散在硅衬底上的完美端面的纳米线中观察到Fabry-Pérot微腔模式，而在自支撑纳米线中没有观察到。我们发现，尽管一些研究者采用了这种方法，但只考虑材料色散的计算结果与实验测定值并不一致。同时考虑材料色散和波导色散时，计算的群折射率与实验值吻合较好。我们还发现，Fabry-Pérot微腔模式是不可观察的纳米线与宽度小于约180 nm，这主要是由于其不良的反射率在端面由于其弱限制光场。
We report on the fabrication of the nanowires with InGaAs/GaAs heterostructures on the GaAs(111)B substrate using selective-area metal organic vapor phase epitaxy. Fabry-Pérot microcavity modes were observed in the nanowires with perfect end facets dispersed onto the silicon substrate and not observed in the free-standing nanowires. We find that the calculated group refractive indices only considering the material dispersion do not agree with the experimentally determined values although this method was used by some researchers. The calculated group refractive indices considering both the material dispersion and the waveguide dispersion agree with the experimentally determined values well. We also find that Fabry-Pérot microcavity modes are not observable in the nanowires with the width less than about 180 nm, which is mainly caused by their poor reflectivity at the end facets due to their weak confinement to the optical field.