四针状氧化锌晶须的电磁波损耗机理
Mechanisms of Microwave Depletions of Tetra-needle like Zinc Oxides
摘要 分析了四针状氧化锌晶须(T-ZnOw)的电磁波损耗机理,首先从T-ZnOw形成立体导电网及其感应涡流损耗和晶须内部散射电场计算等宏观角度讨论了入射电磁波损耗机制;其次,从针尖电荷集中和界面极化的角度分析了该晶须的电磁波损耗机理;最后,用量子力学的观点讨论了T-ZnOw与电磁波作用机理,发现隧道效应和量子势阱理论都可用于解释该晶须在2~18 GHz频率范围内的电磁波损耗。
关键词 四针状氧化锌晶须;电磁波损耗;隧道效应;量子势阱理论
Abstract The microwave depleting mechanisms of tetra-needle like zinc oxides (T-
ZnOw) have been discussed. Firstly, the formation of the conductive networks and the
induced eddy current, and the inner scattering of the T-ZnOw were put forward as the
viewpoint of macro-scope. Secondly, the charge concentration at the needle's tip and
the interface-polarization of T-ZnOw were found to be distinct, which led to
electromagnetic loss. Finally, the quantum mechanics was introduced to discuss the
mechanism, and the results indicated that both the tunnel effect and the quantum
potential well could be applied for explaining the electromagnetic depletion between 2
~18 GHz for the related whiskers.
Keywords T-ZnOw;microwave depletions;tunnel effect;quantum potential
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