Analysis of the efficiency with which geometrically asymmetric metal–vacuum–metal junctions can be used for the rectification of infrared and optical radiations
Analysis of the efficiency with which geometrically asymmetric metal–vacuum–metal junctions can be used for the rectification of infrared and optical radiations
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分析几何不对称金属-真空-金属结用于红外和光辐射整流的效率
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
P. H. Cutler
中科院分区：
文献类型：
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作者：
A. Mayer;M. Chung;P. Lerner;B. Weiss;N. Miskovsky;P. H. Cutler
作者模拟了几何不对称金属-真空-金属结的整流特性，其中一种金属是平坦的，而另一种金属被一个尖锐的尖端延伸。作者特别分析了入射辐射的能量，从红外到可见光的频率，转移到穿过结的电子上的效率。这种随时间变化的电子散射问题用传递矩阵方法解决了。为了验证该技术，将使用该量子力学方案获得的结果与基于静态电流-电压数据外推的模型提供的结果进行了比较。然后，作者讨论了与能量在这些结中转换的效率相关的概念。最后，作者分析了在这些接点上产生的电势的振幅和角频率、金属接触的功函数、电势的影响。
The authors simulate the rectification properties of geometrically asymmetric metal–vacuum–metal junctions in which one of the metals is flat while the other is extended by a sharp tip. The authors analyze, in particular, the efficiency with which the energy of incident radiations, with frequencies in the infrared through the visible, is transferred to the electrons that cross the junction. This time-dependent electronic scattering problem is solved by using a transfer-matrix methodology. In order to validate this technique, the results achieved by using this quantum-mechanical scheme are compared with those provided by models that are based on extrapolations of static current–voltage data. The authors then discuss concepts that are relevant to the efficiency with which energy is converted in these junctions. The authors finally analyze how this efficiency is affected by the amplitude and the angular frequency of the potentials that are induced in these junctions, the work function of the metallic contact...