Scaling of sensitivity and efficiency in planar microresonators for electron spin resonance
Scaling of sensitivity and efficiency in planar microresonators for electron spin resonance
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DOI：
10.1063/1.2964926
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发表时间：
2008-08-01
影响因子：
1.6
通讯作者：
Niemeyer, I.
中科院分区：
文献类型：
--
作者：
Narkowicz, R.;Suter, D.;Niemeyer, I.
使用尺寸与所研究的结构相匹配的微谐振器，可以显著提高体积有限样品或纳米结构材料的电子自旋共振（ESR）效率。我们描述了一系列平面微谐振器，它们在微波转换效率（给定输入功率的微波场强度）和灵敏度（最小可检测自旋数）方面比传统ESR谐振器有了很大的改进。我们探讨了这些参数对谐振腔尺寸的依赖关系，发现它们几乎与谐振腔尺寸的反比成线性关系。将平面微谐振器的回路从500 Am缩小到20 Am，使这些结构的微波效率和灵敏度提高了一个数量级以上，并将微波功率要求降低了两个数量级以上。(C) 2008年美国物理研究所。
Electron spin resonance (ESR) of volume-limited samples or nanostructured materials can be made significantly more efficient by using microresonators whose size matches that of the structures under investigation. We describe a series of planar microresonators that show large improvements over conventional ESR resonators in terms of microwave conversion efficiency (microwave field strength for a given input power) and sensitivity (minimum number of detectable spins). We explore the dependence of these parameters on the size of the resonator and find that both scale almost linearly with the inverse of the resonator size. Scaling down the loops of the planar microresonators from 500 down to 20 Am improves the microwave efficiency and the sensitivity of these structures by more than an order of magnitude and reduces the microwave power requirements by more than two orders of magnitude. (C) 2008 American Institute of Physics.